diff --git a/src/main/scala/gitbucket/core/controller/AccountController.scala b/src/main/scala/gitbucket/core/controller/AccountController.scala
index c4b2895..0857f04 100644
--- a/src/main/scala/gitbucket/core/controller/AccountController.scala
+++ b/src/main/scala/gitbucket/core/controller/AccountController.scala
@@ -38,21 +38,9 @@
     with RequestCache
 
 trait AccountControllerBase extends AccountManagementControllerBase {
-  self: AccountService
-    with RepositoryService
-    with ActivityService
-    with WikiService
-    with LabelsService
-    with SshKeyService
-    with GpgKeyService
-    with OneselfAuthenticator
-    with UsersAuthenticator
-    with GroupManagerAuthenticator
-    with ReadableUsersAuthenticator
-    with AccessTokenService
-    with WebHookService
-    with PrioritiesService
-    with RepositoryCreationService =>
+  self: AccountService & RepositoryService & ActivityService & WikiService & LabelsService & SshKeyService &
+    GpgKeyService & OneselfAuthenticator & UsersAuthenticator & GroupManagerAuthenticator & ReadableUsersAuthenticator &
+    AccessTokenService & WebHookService & PrioritiesService & RepositoryCreationService =>
 
   case class AccountNewForm(
     userName: String,
diff --git a/src/main/scala/gitbucket/core/controller/DashboardController.scala b/src/main/scala/gitbucket/core/controller/DashboardController.scala
index 898ae7b..728a800 100644
--- a/src/main/scala/gitbucket/core/controller/DashboardController.scala
+++ b/src/main/scala/gitbucket/core/controller/DashboardController.scala
@@ -28,12 +28,8 @@
     with RequestCache
 
 trait DashboardControllerBase extends ControllerBase {
-  self: IssuesService
-    with PullRequestService
-    with RepositoryService
-    with AccountService
-    with CommitStatusService
-    with UsersAuthenticator =>
+  self: IssuesService & PullRequestService & RepositoryService & AccountService & CommitStatusService &
+    UsersAuthenticator =>
 
   get("/dashboard/repos")(usersOnly {
     context.withLoginAccount { loginAccount =>
diff --git a/src/main/scala/gitbucket/core/controller/IndexController.scala b/src/main/scala/gitbucket/core/controller/IndexController.scala
index 5b7ddb1..73a16f5 100644
--- a/src/main/scala/gitbucket/core/controller/IndexController.scala
+++ b/src/main/scala/gitbucket/core/controller/IndexController.scala
@@ -34,15 +34,8 @@
     with RequestCache
 
 trait IndexControllerBase extends ControllerBase {
-  self: RepositoryService
-    with ActivityService
-    with AccountService
-    with RepositorySearchService
-    with UsersAuthenticator
-    with ReferrerAuthenticator
-    with AccessTokenService
-    with AccountFederationService
-    with OpenIDConnectService =>
+  self: RepositoryService & ActivityService & AccountService & RepositorySearchService & UsersAuthenticator &
+    ReferrerAuthenticator & AccessTokenService & AccountFederationService & OpenIDConnectService =>
 
   case class SignInForm(userName: String, password: String, hash: Option[String])
 
diff --git a/src/main/scala/gitbucket/core/controller/IssuesController.scala b/src/main/scala/gitbucket/core/controller/IssuesController.scala
index 4e96b81..a6a0056 100644
--- a/src/main/scala/gitbucket/core/controller/IssuesController.scala
+++ b/src/main/scala/gitbucket/core/controller/IssuesController.scala
@@ -34,21 +34,10 @@
     with RequestCache
 
 trait IssuesControllerBase extends ControllerBase {
-  self: IssuesService
-    with RepositoryService
-    with AccountService
-    with LabelsService
-    with MilestonesService
-    with ActivityService
-    with HandleCommentService
-    with IssueCreationService
-    with CustomFieldsService
-    with ReadableUsersAuthenticator
-    with ReferrerAuthenticator
-    with WritableUsersAuthenticator
-    with PullRequestService
-    with WebHookIssueCommentService
-    with PrioritiesService =>
+  self: IssuesService & RepositoryService & AccountService & LabelsService & MilestonesService & ActivityService &
+    HandleCommentService & IssueCreationService & CustomFieldsService & ReadableUsersAuthenticator &
+    ReferrerAuthenticator & WritableUsersAuthenticator & PullRequestService & WebHookIssueCommentService &
+    PrioritiesService =>
 
   case class IssueCreateForm(
     title: String,
diff --git a/src/main/scala/gitbucket/core/controller/LabelsController.scala b/src/main/scala/gitbucket/core/controller/LabelsController.scala
index 5701538..55ae896 100644
--- a/src/main/scala/gitbucket/core/controller/LabelsController.scala
+++ b/src/main/scala/gitbucket/core/controller/LabelsController.scala
@@ -28,11 +28,7 @@
     with WritableUsersAuthenticator
 
 trait LabelsControllerBase extends ControllerBase {
-  self: LabelsService
-    with IssuesService
-    with RepositoryService
-    with ReferrerAuthenticator
-    with WritableUsersAuthenticator =>
+  self: LabelsService & IssuesService & RepositoryService & ReferrerAuthenticator & WritableUsersAuthenticator =>
 
   case class LabelForm(labelName: String, color: String)
 
diff --git a/src/main/scala/gitbucket/core/controller/MilestonesController.scala b/src/main/scala/gitbucket/core/controller/MilestonesController.scala
index ceaae31..ae82ff2 100644
--- a/src/main/scala/gitbucket/core/controller/MilestonesController.scala
+++ b/src/main/scala/gitbucket/core/controller/MilestonesController.scala
@@ -26,11 +26,8 @@
     with WritableUsersAuthenticator
 
 trait MilestonesControllerBase extends ControllerBase {
-  self: MilestonesService
-    with RepositoryService
-    with CommitStatusService
-    with ReferrerAuthenticator
-    with WritableUsersAuthenticator =>
+  self: MilestonesService & RepositoryService & CommitStatusService & ReferrerAuthenticator &
+    WritableUsersAuthenticator =>
 
   case class MilestoneForm(title: String, description: Option[String], dueDate: Option[java.util.Date])
 
diff --git a/src/main/scala/gitbucket/core/controller/PrioritiesController.scala b/src/main/scala/gitbucket/core/controller/PrioritiesController.scala
index 6231863..d4f9475 100644
--- a/src/main/scala/gitbucket/core/controller/PrioritiesController.scala
+++ b/src/main/scala/gitbucket/core/controller/PrioritiesController.scala
@@ -28,11 +28,7 @@
     with WritableUsersAuthenticator
 
 trait PrioritiesControllerBase extends ControllerBase {
-  self: PrioritiesService
-    with IssuesService
-    with RepositoryService
-    with ReferrerAuthenticator
-    with WritableUsersAuthenticator =>
+  self: PrioritiesService & IssuesService & RepositoryService & ReferrerAuthenticator & WritableUsersAuthenticator =>
 
   case class PriorityForm(priorityName: String, description: Option[String], color: String)
 
diff --git a/src/main/scala/gitbucket/core/controller/PullRequestsController.scala b/src/main/scala/gitbucket/core/controller/PullRequestsController.scala
index 5fd39ed..04dee17 100644
--- a/src/main/scala/gitbucket/core/controller/PullRequestsController.scala
+++ b/src/main/scala/gitbucket/core/controller/PullRequestsController.scala
@@ -40,23 +40,10 @@
     with RequestCache
 
 trait PullRequestsControllerBase extends ControllerBase {
-  self: RepositoryService
-    with AccountService
-    with IssuesService
-    with MilestonesService
-    with LabelsService
-    with CustomFieldsService
-    with CommitsService
-    with ActivityService
-    with PullRequestService
-    with WebHookPullRequestService
-    with ReadableUsersAuthenticator
-    with ReferrerAuthenticator
-    with WritableUsersAuthenticator
-    with CommitStatusService
-    with MergeService
-    with ProtectedBranchService
-    with PrioritiesService =>
+  self: RepositoryService & AccountService & IssuesService & MilestonesService & LabelsService & CustomFieldsService &
+    CommitsService & ActivityService & PullRequestService & WebHookPullRequestService & ReadableUsersAuthenticator &
+    ReferrerAuthenticator & WritableUsersAuthenticator & CommitStatusService & MergeService & ProtectedBranchService &
+    PrioritiesService =>
 
   val pullRequestForm = mapping(
     "title" -> trim(label("Title", text(required))),
@@ -569,7 +556,7 @@
     val (originOwner, tmpOriginBranch) = parseCompareIdentifier(origin, forkedRepository.owner)
     val (forkedOwner, tmpForkedBranch) = parseCompareIdentifier(forked, forkedRepository.owner)
 
-    (for (
+    (for {
       originRepositoryName <-
         if (originOwner == forkedOwner) {
           Some(forkedRepository.name)
@@ -579,9 +566,9 @@
               .find(_.userName == originOwner)
               .map(_.repositoryName)
           }
-        };
+        }
       originRepository <- getRepository(originOwner, originRepositoryName)
-    ) yield {
+    } yield {
       Using.resources(
         Git.open(getRepositoryDir(originRepository.owner, originRepository.name)),
         Git.open(getRepositoryDir(forkedRepository.owner, forkedRepository.name))
diff --git a/src/main/scala/gitbucket/core/controller/ReleasesController.scala b/src/main/scala/gitbucket/core/controller/ReleasesController.scala
index 252ed71..f572bc2 100644
--- a/src/main/scala/gitbucket/core/controller/ReleasesController.scala
+++ b/src/main/scala/gitbucket/core/controller/ReleasesController.scala
@@ -33,13 +33,8 @@
     with RequestCache
 
 trait ReleaseControllerBase extends ControllerBase {
-  self: RepositoryService
-    with AccountService
-    with ReleaseService
-    with ReadableUsersAuthenticator
-    with ReferrerAuthenticator
-    with WritableUsersAuthenticator
-    with ActivityService =>
+  self: RepositoryService & AccountService & ReleaseService & ReadableUsersAuthenticator & ReferrerAuthenticator &
+    WritableUsersAuthenticator & ActivityService =>
 
   case class ReleaseForm(
     name: String,
diff --git a/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala b/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala
index 1b23379..808bf44 100644
--- a/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala
+++ b/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala
@@ -37,16 +37,8 @@
     with RequestCache
 
 trait RepositorySettingsControllerBase extends ControllerBase {
-  self: RepositoryService
-    with AccountService
-    with WebHookService
-    with ProtectedBranchService
-    with CommitStatusService
-    with DeployKeyService
-    with CustomFieldsService
-    with ActivityService
-    with OwnerAuthenticator
-    with UsersAuthenticator =>
+  self: RepositoryService & AccountService & WebHookService & ProtectedBranchService & CommitStatusService &
+    DeployKeyService & CustomFieldsService & ActivityService & OwnerAuthenticator & UsersAuthenticator =>
 
   // for repository options
   case class OptionsForm(
diff --git a/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala b/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
index 1dab857..3cf7e8b 100644
--- a/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
+++ b/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
@@ -65,21 +65,10 @@
  * The repository viewer.
  */
 trait RepositoryViewerControllerBase extends ControllerBase {
-  self: RepositoryService
-    with RepositoryCommitFileService
-    with AccountService
-    with ActivityService
-    with IssuesService
-    with WebHookService
-    with CommitsService
-    with ReadableUsersAuthenticator
-    with ReferrerAuthenticator
-    with WritableUsersAuthenticator
-    with PullRequestService
-    with CommitStatusService
-    with WebHookPullRequestService
-    with WebHookPullRequestReviewCommentService
-    with ProtectedBranchService =>
+  self: RepositoryService & RepositoryCommitFileService & AccountService & ActivityService & IssuesService &
+    WebHookService & CommitsService & ReadableUsersAuthenticator & ReferrerAuthenticator & WritableUsersAuthenticator &
+    PullRequestService & CommitStatusService & WebHookPullRequestService & WebHookPullRequestReviewCommentService &
+    ProtectedBranchService =>
 
   ArchiveCommand.registerFormat("zip", new ZipFormat)
   ArchiveCommand.registerFormat("tar.gz", new TgzFormat)
diff --git a/src/main/scala/gitbucket/core/controller/SystemSettingsController.scala b/src/main/scala/gitbucket/core/controller/SystemSettingsController.scala
index e75714d..4835e5c 100644
--- a/src/main/scala/gitbucket/core/controller/SystemSettingsController.scala
+++ b/src/main/scala/gitbucket/core/controller/SystemSettingsController.scala
@@ -29,7 +29,7 @@
 case class Column(name: String, primaryKey: Boolean)
 
 trait SystemSettingsControllerBase extends AccountManagementControllerBase {
-  self: AccountService with RepositoryService with AdminAuthenticator =>
+  self: AccountService & RepositoryService & AdminAuthenticator =>
 
   private val form = mapping(
     "baseUrl" -> trim(label("Base URL", optional(text()))),
diff --git a/src/main/scala/gitbucket/core/controller/ValidationSupport.scala b/src/main/scala/gitbucket/core/controller/ValidationSupport.scala
index 4ab8336..1e7e7f2 100644
--- a/src/main/scala/gitbucket/core/controller/ValidationSupport.scala
+++ b/src/main/scala/gitbucket/core/controller/ValidationSupport.scala
@@ -10,7 +10,7 @@
 /**
  * Extends scalatra-forms to support the client-side validation and Ajax requests as well.
  */
-trait ValidationSupport extends FormSupport { self: ServletBase with JacksonJsonSupport with I18nSupport =>
+trait ValidationSupport extends FormSupport { self: ServletBase & JacksonJsonSupport & I18nSupport =>
 
   def get[T](path: String, form: ValueType[T])(action: T => Any): Route = {
     registerValidate(path, form)
diff --git a/src/main/scala/gitbucket/core/controller/WikiController.scala b/src/main/scala/gitbucket/core/controller/WikiController.scala
index de1e097..028691e 100644
--- a/src/main/scala/gitbucket/core/controller/WikiController.scala
+++ b/src/main/scala/gitbucket/core/controller/WikiController.scala
@@ -29,13 +29,8 @@
     with RequestCache
 
 trait WikiControllerBase extends ControllerBase {
-  self: WikiService
-    with RepositoryService
-    with AccountService
-    with ActivityService
-    with WebHookService
-    with ReadableUsersAuthenticator
-    with ReferrerAuthenticator =>
+  self: WikiService & RepositoryService & AccountService & ActivityService & WebHookService &
+    ReadableUsersAuthenticator & ReferrerAuthenticator =>
 
   case class WikiPageEditForm(
     pageName: String,
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiGitReferenceControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiGitReferenceControllerBase.scala
index af368b2..fef3b49 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiGitReferenceControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiGitReferenceControllerBase.scala
@@ -15,7 +15,7 @@
 import scala.util.Using
 
 trait ApiGitReferenceControllerBase extends ControllerBase {
-  self: ReferrerAuthenticator with WritableUsersAuthenticator =>
+  self: ReferrerAuthenticator & WritableUsersAuthenticator =>
 
   private val logger = LoggerFactory.getLogger(classOf[ApiGitReferenceControllerBase])
 
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiIssueCommentControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiIssueCommentControllerBase.scala
index 9659929..3e8892e 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiIssueCommentControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiIssueCommentControllerBase.scala
@@ -7,13 +7,8 @@
 import org.scalatra.ActionResult
 
 trait ApiIssueCommentControllerBase extends ControllerBase {
-  self: AccountService
-    with IssuesService
-    with RepositoryService
-    with HandleCommentService
-    with MilestonesService
-    with ReadableUsersAuthenticator
-    with ReferrerAuthenticator =>
+  self: AccountService & IssuesService & RepositoryService & HandleCommentService & MilestonesService &
+    ReadableUsersAuthenticator & ReferrerAuthenticator =>
   /*
    * i. List issue comments for a repository
    * https://docs.github.com/en/rest/reference/issues#list-issue-comments-for-a-repository
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiIssueControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiIssueControllerBase.scala
index c22e4bc..599547d 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiIssueControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiIssueControllerBase.scala
@@ -9,12 +9,8 @@
 import gitbucket.core.util.Implicits._
 
 trait ApiIssueControllerBase extends ControllerBase {
-  self: AccountService
-    with IssuesService
-    with IssueCreationService
-    with MilestonesService
-    with ReadableUsersAuthenticator
-    with ReferrerAuthenticator =>
+  self: AccountService & IssuesService & IssueCreationService & MilestonesService & ReadableUsersAuthenticator &
+    ReferrerAuthenticator =>
   /*
    * i. List issues
    * https://developer.github.com/v3/issues/#list-issues
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiIssueLabelControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiIssueLabelControllerBase.scala
index a4b45db..daa6fb0 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiIssueLabelControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiIssueLabelControllerBase.scala
@@ -7,11 +7,7 @@
 import org.scalatra.{Created, NoContent, UnprocessableEntity}
 
 trait ApiIssueLabelControllerBase extends ControllerBase {
-  self: AccountService
-    with IssuesService
-    with LabelsService
-    with ReferrerAuthenticator
-    with WritableUsersAuthenticator =>
+  self: AccountService & IssuesService & LabelsService & ReferrerAuthenticator & WritableUsersAuthenticator =>
 
   /*
    * i. List all labels for this repository
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiIssueMilestoneControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiIssueMilestoneControllerBase.scala
index 9b55238..ddad86a 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiIssueMilestoneControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiIssueMilestoneControllerBase.scala
@@ -7,7 +7,7 @@
 import org.scalatra.NoContent
 
 trait ApiIssueMilestoneControllerBase extends ControllerBase {
-  self: MilestonesService with WritableUsersAuthenticator with ReferrerAuthenticator =>
+  self: MilestonesService & WritableUsersAuthenticator & ReferrerAuthenticator =>
 
   /*
    * i. List milestones
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiOrganizationControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiOrganizationControllerBase.scala
index b5545ed..6453580 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiOrganizationControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiOrganizationControllerBase.scala
@@ -6,7 +6,7 @@
 import gitbucket.core.util.{AdminAuthenticator, UsersAuthenticator}
 
 trait ApiOrganizationControllerBase extends ControllerBase {
-  self: RepositoryService with AccountService with AdminAuthenticator with UsersAuthenticator =>
+  self: RepositoryService & AccountService & AdminAuthenticator & UsersAuthenticator =>
 
   /*
    * i. List your organizations
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiPullRequestControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiPullRequestControllerBase.scala
index 550a53a..f2529bb 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiPullRequestControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiPullRequestControllerBase.scala
@@ -16,14 +16,8 @@
 import scala.jdk.CollectionConverters._
 
 trait ApiPullRequestControllerBase extends ControllerBase {
-  self: AccountService
-    with IssuesService
-    with PullRequestService
-    with RepositoryService
-    with MergeService
-    with ReferrerAuthenticator
-    with ReadableUsersAuthenticator
-    with WritableUsersAuthenticator =>
+  self: AccountService & IssuesService & PullRequestService & RepositoryService & MergeService & ReferrerAuthenticator &
+    ReadableUsersAuthenticator & WritableUsersAuthenticator =>
 
   /*
    * i. Link Relations
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiReleaseControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiReleaseControllerBase.scala
index e040ef0..93e7f13 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiReleaseControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiReleaseControllerBase.scala
@@ -11,7 +11,7 @@
 import org.scalatra.NoContent
 
 trait ApiReleaseControllerBase extends ControllerBase {
-  self: AccountService with ReleaseService with ReferrerAuthenticator with WritableUsersAuthenticator =>
+  self: AccountService & ReleaseService & ReferrerAuthenticator & WritableUsersAuthenticator =>
 
   /**
    * i. List releases for a repository
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryBranchControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryBranchControllerBase.scala
index 6ec5635..82d4899 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryBranchControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryBranchControllerBase.scala
@@ -12,15 +12,8 @@
 import scala.util.Using
 
 trait ApiRepositoryBranchControllerBase extends ControllerBase {
-  self: RepositoryService
-    with AccountService
-    with OwnerAuthenticator
-    with UsersAuthenticator
-    with GroupManagerAuthenticator
-    with ProtectedBranchService
-    with ReferrerAuthenticator
-    with ReadableUsersAuthenticator
-    with WritableUsersAuthenticator =>
+  self: RepositoryService & AccountService & OwnerAuthenticator & UsersAuthenticator & GroupManagerAuthenticator &
+    ProtectedBranchService & ReferrerAuthenticator & ReadableUsersAuthenticator & WritableUsersAuthenticator =>
 
   /**
    * i. List branches
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCollaboratorControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCollaboratorControllerBase.scala
index f234795..4a8ab09 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCollaboratorControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCollaboratorControllerBase.scala
@@ -7,7 +7,7 @@
 import org.scalatra.NoContent
 
 trait ApiRepositoryCollaboratorControllerBase extends ControllerBase {
-  self: RepositoryService with AccountService with ReferrerAuthenticator with OwnerAuthenticator =>
+  self: RepositoryService & AccountService & ReferrerAuthenticator & OwnerAuthenticator =>
 
   /*
    * i. List repository collaborators
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCommitControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCommitControllerBase.scala
index c4c5322..49b9827 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCommitControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryCommitControllerBase.scala
@@ -21,7 +21,7 @@
 import scala.util.Using
 
 trait ApiRepositoryCommitControllerBase extends ControllerBase {
-  self: AccountService with CommitsService with ProtectedBranchService with ReferrerAuthenticator =>
+  self: AccountService & CommitsService & ProtectedBranchService & ReferrerAuthenticator =>
   /*
    * i. List commits on a repository
    * https://developer.github.com/v3/repos/commits/#list-commits-on-a-repository
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryContentsControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryContentsControllerBase.scala
index 381d871..1f0c40b 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryContentsControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryContentsControllerBase.scala
@@ -12,7 +12,7 @@
 import scala.util.Using
 
 trait ApiRepositoryContentsControllerBase extends ControllerBase {
-  self: ReferrerAuthenticator with WritableUsersAuthenticator with RepositoryCommitFileService =>
+  self: ReferrerAuthenticator & WritableUsersAuthenticator & RepositoryCommitFileService =>
 
   /**
    * i. Get a repository README
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryControllerBase.scala
index a9cd6eb..e4555b9 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryControllerBase.scala
@@ -15,16 +15,9 @@
 import scala.util.Using
 
 trait ApiRepositoryControllerBase extends ControllerBase {
-  self: RepositoryService
-    with ApiGitReferenceControllerBase
-    with RepositoryCreationService
-    with AccountService
-    with OwnerAuthenticator
-    with UsersAuthenticator
-    with GroupManagerAuthenticator
-    with ReferrerAuthenticator
-    with ReadableUsersAuthenticator
-    with WritableUsersAuthenticator =>
+  self: RepositoryService & ApiGitReferenceControllerBase & RepositoryCreationService & AccountService &
+    OwnerAuthenticator & UsersAuthenticator & GroupManagerAuthenticator & ReferrerAuthenticator &
+    ReadableUsersAuthenticator & WritableUsersAuthenticator =>
 
   /**
    * i. List your repositories
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryStatusControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryStatusControllerBase.scala
index bf26ad5..e6d2241 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryStatusControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryStatusControllerBase.scala
@@ -7,7 +7,7 @@
 import gitbucket.core.util.{JGitUtil, ReferrerAuthenticator, WritableUsersAuthenticator}
 
 trait ApiRepositoryStatusControllerBase extends ControllerBase {
-  self: AccountService with CommitStatusService with ReferrerAuthenticator with WritableUsersAuthenticator =>
+  self: AccountService & CommitStatusService & ReferrerAuthenticator & WritableUsersAuthenticator =>
 
   /*
    * i. Create a status
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryWebhookControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryWebhookControllerBase.scala
index 78f5b41..5bfe6c2 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryWebhookControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryWebhookControllerBase.scala
@@ -8,7 +8,7 @@
 import org.scalatra.NoContent
 
 trait ApiRepositoryWebhookControllerBase extends ControllerBase {
-  self: RepositoryService with WebHookService with ReferrerAuthenticator with WritableUsersAuthenticator =>
+  self: RepositoryService & WebHookService & ReferrerAuthenticator & WritableUsersAuthenticator =>
 
   /*
    * i. List repository webhooks
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiUserControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiUserControllerBase.scala
index cbf37be..4b76554 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiUserControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiUserControllerBase.scala
@@ -8,7 +8,7 @@
 import org.scalatra.NoContent
 
 trait ApiUserControllerBase extends ControllerBase {
-  self: RepositoryService with AccountService with AdminAuthenticator with UsersAuthenticator =>
+  self: RepositoryService & AccountService & AdminAuthenticator & UsersAuthenticator =>
 
   /**
    * i. Get a single user
diff --git a/src/main/scala/gitbucket/core/service/CommitsService.scala b/src/main/scala/gitbucket/core/service/CommitsService.scala
index d7f7d1d..782e8b5 100644
--- a/src/main/scala/gitbucket/core/service/CommitsService.scala
+++ b/src/main/scala/gitbucket/core/service/CommitsService.scala
@@ -16,7 +16,7 @@
 import org.apache.commons.io.FileUtils
 
 trait CommitsService {
-  self: ActivityService with PullRequestService with WebHookPullRequestReviewCommentService =>
+  self: ActivityService & PullRequestService & WebHookPullRequestReviewCommentService =>
 
   def getCommitComments(owner: String, repository: String, commitId: String, includePullRequest: Boolean)(implicit
     s: Session
diff --git a/src/main/scala/gitbucket/core/service/HandleCommentService.scala b/src/main/scala/gitbucket/core/service/HandleCommentService.scala
index 52f297a..341194a 100644
--- a/src/main/scala/gitbucket/core/service/HandleCommentService.scala
+++ b/src/main/scala/gitbucket/core/service/HandleCommentService.scala
@@ -16,12 +16,8 @@
 import gitbucket.core.util.Implicits._
 
 trait HandleCommentService {
-  self: RepositoryService
-    with IssuesService
-    with ActivityService
-    with WebHookService
-    with WebHookIssueCommentService
-    with WebHookPullRequestService =>
+  self: RepositoryService & IssuesService & ActivityService & WebHookService & WebHookIssueCommentService &
+    WebHookPullRequestService =>
 
   /**
    * @see [[https://github.com/gitbucket/gitbucket/wiki/CommentAction]]
diff --git a/src/main/scala/gitbucket/core/service/IssueCreationService.scala b/src/main/scala/gitbucket/core/service/IssueCreationService.scala
index 467c462..49fcd17 100644
--- a/src/main/scala/gitbucket/core/service/IssueCreationService.scala
+++ b/src/main/scala/gitbucket/core/service/IssueCreationService.scala
@@ -10,7 +10,7 @@
 
 trait IssueCreationService {
 
-  self: RepositoryService with WebHookIssueCommentService with LabelsService with IssuesService with ActivityService =>
+  self: RepositoryService & WebHookIssueCommentService & LabelsService & IssuesService & ActivityService =>
 
   def createIssue(
     repository: RepositoryInfo,
diff --git a/src/main/scala/gitbucket/core/service/IssuesService.scala b/src/main/scala/gitbucket/core/service/IssuesService.scala
index d2a9d2f..9832333 100644
--- a/src/main/scala/gitbucket/core/service/IssuesService.scala
+++ b/src/main/scala/gitbucket/core/service/IssuesService.scala
@@ -26,7 +26,7 @@
 import scala.jdk.CollectionConverters._
 
 trait IssuesService {
-  self: AccountService with RepositoryService with LabelsService with PrioritiesService with MilestonesService =>
+  self: AccountService & RepositoryService & LabelsService & PrioritiesService & MilestonesService =>
   import IssuesService._
 
   def getIssue(owner: String, repository: String, issueId: String)(implicit s: Session) =
diff --git a/src/main/scala/gitbucket/core/service/MergeService.scala b/src/main/scala/gitbucket/core/service/MergeService.scala
index b9d9268..1e76379 100644
--- a/src/main/scala/gitbucket/core/service/MergeService.scala
+++ b/src/main/scala/gitbucket/core/service/MergeService.scala
@@ -23,13 +23,8 @@
 import scala.util.Using
 
 trait MergeService {
-  self: AccountService
-    with ActivityService
-    with IssuesService
-    with RepositoryService
-    with PullRequestService
-    with WebHookPullRequestService
-    with WebHookService =>
+  self: AccountService & ActivityService & IssuesService & RepositoryService & PullRequestService &
+    WebHookPullRequestService & WebHookService =>
 
   import MergeService._
 
diff --git a/src/main/scala/gitbucket/core/service/PullRequestService.scala b/src/main/scala/gitbucket/core/service/PullRequestService.scala
index ffbdeb9..3db36b5 100644
--- a/src/main/scala/gitbucket/core/service/PullRequestService.scala
+++ b/src/main/scala/gitbucket/core/service/PullRequestService.scala
@@ -25,13 +25,8 @@
 import scala.util.Using
 
 trait PullRequestService {
-  self: IssuesService
-    with CommitsService
-    with WebHookService
-    with WebHookPullRequestService
-    with RepositoryService
-    with MergeService
-    with ActivityService =>
+  self: IssuesService & CommitsService & WebHookService & WebHookPullRequestService & RepositoryService & MergeService &
+    ActivityService =>
   import PullRequestService.*
 
   def getPullRequest(owner: String, repository: String, issueId: Int)(implicit
diff --git a/src/main/scala/gitbucket/core/service/ReleaseService.scala b/src/main/scala/gitbucket/core/service/ReleaseService.scala
index f6542d3..64f2194 100644
--- a/src/main/scala/gitbucket/core/service/ReleaseService.scala
+++ b/src/main/scala/gitbucket/core/service/ReleaseService.scala
@@ -8,7 +8,7 @@
 import gitbucket.core.util.JGitUtil
 
 trait ReleaseService {
-  self: AccountService with RepositoryService =>
+  self: AccountService & RepositoryService =>
 
   def createReleaseAsset(
     owner: String,
diff --git a/src/main/scala/gitbucket/core/service/RepositoryCommitFileService.scala b/src/main/scala/gitbucket/core/service/RepositoryCommitFileService.scala
index efbd7a4..dd38a00 100644
--- a/src/main/scala/gitbucket/core/service/RepositoryCommitFileService.scala
+++ b/src/main/scala/gitbucket/core/service/RepositoryCommitFileService.scala
@@ -17,12 +17,8 @@
 import scala.util.Using
 
 trait RepositoryCommitFileService {
-  self: AccountService
-    with ActivityService
-    with IssuesService
-    with PullRequestService
-    with WebHookPullRequestService
-    with RepositoryService =>
+  self: AccountService & ActivityService & IssuesService & PullRequestService & WebHookPullRequestService &
+    RepositoryService =>
 
   /**
    * Create multiple files by callback function.
diff --git a/src/main/scala/gitbucket/core/service/RepositoryCreationService.scala b/src/main/scala/gitbucket/core/service/RepositoryCreationService.scala
index b4e13c0..1961299 100644
--- a/src/main/scala/gitbucket/core/service/RepositoryCreationService.scala
+++ b/src/main/scala/gitbucket/core/service/RepositoryCreationService.scala
@@ -46,12 +46,7 @@
 }
 
 trait RepositoryCreationService {
-  self: AccountService
-    with RepositoryService
-    with LabelsService
-    with WikiService
-    with ActivityService
-    with PrioritiesService =>
+  self: AccountService & RepositoryService & LabelsService & WikiService & ActivityService & PrioritiesService =>
 
   def canCreateRepository(repositoryOwner: String, loginAccount: Account)(implicit session: Session): Boolean = {
     repositoryOwner == loginAccount.userName || getGroupsByUserName(loginAccount.userName)
diff --git a/src/main/scala/gitbucket/core/service/WebHookService.scala b/src/main/scala/gitbucket/core/service/WebHookService.scala
index 1fdcaa4..2fb7c78 100644
--- a/src/main/scala/gitbucket/core/service/WebHookService.scala
+++ b/src/main/scala/gitbucket/core/service/WebHookService.scala
@@ -367,7 +367,7 @@
 }
 
 trait WebHookPullRequestService extends WebHookService {
-  self: AccountService with RepositoryService with PullRequestService with IssuesService =>
+  self: AccountService & RepositoryService & PullRequestService & IssuesService =>
 
   import WebHookService._
   // https://developer.github.com/v3/activity/events/types/#issuesevent
@@ -513,7 +513,7 @@
 }
 
 trait WebHookPullRequestReviewCommentService extends WebHookService {
-  self: AccountService with RepositoryService with PullRequestService with IssuesService with CommitsService =>
+  self: AccountService & RepositoryService & PullRequestService & IssuesService & CommitsService =>
   def callPullRequestReviewCommentWebHook(
     action: String,
     comment: CommitComment,
@@ -561,7 +561,7 @@
 }
 
 trait WebHookIssueCommentService extends WebHookPullRequestService {
-  self: AccountService with RepositoryService with PullRequestService with IssuesService =>
+  self: AccountService & RepositoryService & PullRequestService & IssuesService =>
 
   import WebHookService._
   def callIssueCommentWebHook(
diff --git a/src/main/scala/gitbucket/core/ssh/GitCommand.scala b/src/main/scala/gitbucket/core/ssh/GitCommand.scala
index 8b72456..8628b38 100644
--- a/src/main/scala/gitbucket/core/ssh/GitCommand.scala
+++ b/src/main/scala/gitbucket/core/ssh/GitCommand.scala
@@ -92,7 +92,7 @@
 }
 
 abstract class DefaultGitCommand(val owner: String, val repoName: String) extends GitCommand {
-  self: RepositoryService with AccountService with DeployKeyService =>
+  self: RepositoryService & AccountService & DeployKeyService =>
 
   protected def userName(authType: AuthType): String = {
     authType match {
diff --git a/src/main/scala/gitbucket/core/util/Authenticator.scala b/src/main/scala/gitbucket/core/util/Authenticator.scala
index 5805022..abd4eb5 100644
--- a/src/main/scala/gitbucket/core/util/Authenticator.scala
+++ b/src/main/scala/gitbucket/core/util/Authenticator.scala
@@ -25,7 +25,7 @@
 /**
  * Allows only the repository owner and administrators.
  */
-trait OwnerAuthenticator { self: ControllerBase with RepositoryService with AccountService =>
+trait OwnerAuthenticator { self: ControllerBase & RepositoryService & AccountService =>
   protected def ownerOnly(action: (RepositoryInfo) => Any) = { authenticate(action) }
   protected def ownerOnly[T](action: (T, RepositoryInfo) => Any) = (form: T) => { authenticate(action(form, _)) }
 
@@ -82,7 +82,7 @@
 /**
  * Allows only guests and signed in users who can access the repository.
  */
-trait ReferrerAuthenticator { self: ControllerBase with RepositoryService with AccountService =>
+trait ReferrerAuthenticator { self: ControllerBase & RepositoryService & AccountService =>
   protected def referrersOnly(action: (RepositoryInfo) => Any) = { authenticate(action) }
   protected def referrersOnly[T](action: (T, RepositoryInfo) => Any) = (form: T) => { authenticate(action(form, _)) }
 
@@ -102,7 +102,7 @@
 /**
  * Allows only signed in users who have read permission for the repository.
  */
-trait ReadableUsersAuthenticator { self: ControllerBase with RepositoryService with AccountService =>
+trait ReadableUsersAuthenticator { self: ControllerBase & RepositoryService & AccountService =>
   protected def readableUsersOnly(action: (RepositoryInfo) => Any) = { authenticate(action) }
   protected def readableUsersOnly[T](action: (T, RepositoryInfo) => Any) = (form: T) => {
     authenticate(action(form, _))
@@ -124,7 +124,7 @@
 /**
  * Allows only signed in users who have write permission for the repository.
  */
-trait WritableUsersAuthenticator { self: ControllerBase with RepositoryService with AccountService =>
+trait WritableUsersAuthenticator { self: ControllerBase & RepositoryService & AccountService =>
   protected def writableUsersOnly(action: (RepositoryInfo) => Any) = { authenticate(action) }
   protected def writableUsersOnly[T](action: (T, RepositoryInfo) => Any) = (form: T) => {
     authenticate(action(form, _))
@@ -151,7 +151,7 @@
 /**
  * Allows only the group managers.
  */
-trait GroupManagerAuthenticator { self: ControllerBase with AccountService =>
+trait GroupManagerAuthenticator { self: ControllerBase & AccountService =>
   protected def managersOnly(action: => Any) = { authenticate(action) }
   protected def managersOnly[T](action: T => Any) = (form: T) => { authenticate(action(form)) }