diff --git a/src/main/scala/gitbucket/core/controller/ReleasesController.scala b/src/main/scala/gitbucket/core/controller/ReleasesController.scala
index 90c887c..89de469 100644
--- a/src/main/scala/gitbucket/core/controller/ReleasesController.scala
+++ b/src/main/scala/gitbucket/core/controller/ReleasesController.scala
@@ -8,9 +8,9 @@
 import gitbucket.core.util.Implicits._
 import org.scalatra.forms._
 import gitbucket.core.releases.html
-import gitbucket.core.util.SyntaxSugars.using
 import org.apache.commons.io.FileUtils
 import org.eclipse.jgit.api.Git
+import scala.util.Using
 
 class ReleaseController
     extends ReleaseControllerBase
@@ -130,7 +130,7 @@
     val Seq(previousTag, currentTag) = multiParams("splat")
     val previousTagId = repository.tags.collectFirst { case x if x.name == previousTag => x.id }.getOrElse("")
 
-    val commitLog = using(Git.open(getRepositoryDir(repository.owner, repository.name))) { git =>
+    val commitLog = Using.resource(Git.open(getRepositoryDir(repository.owner, repository.name))) { git =>
       val commits = JGitUtil.getCommitLog(git, previousTagId, currentTag).reverse
       commits
         .map { commit =>
diff --git a/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala b/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
index 678c36f..a0db8bd 100644
--- a/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
+++ b/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
@@ -996,7 +996,7 @@
               val mode = treeWalk.getFileMode.getBits
               JGitUtil.openFile(git, repository, commit.getTree, treeWalk.getPathString) { in =>
                 val tempFile = File.createTempFile("gitbucket", ".archive")
-                val size = using(new FileOutputStream(tempFile)) { out =>
+                val size = Using.resource(new FileOutputStream(tempFile)) { out =>
                   IOUtils.copy(
                     EolStreamTypeUtil.wrapInputStream(
                       in,
@@ -1013,7 +1013,7 @@
 
                 val entry: ArchiveEntry = entryCreator(entryPath, size, date, mode)
                 archive.putArchiveEntry(entry)
-                using(new FileInputStream(tempFile)) { in =>
+                Using.resource(new FileInputStream(tempFile)) { in =>
                   IOUtils.copy(in, archive)
                 }
                 archive.closeArchiveEntry()
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiPullRequestControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiPullRequestControllerBase.scala
index 63996a1..3a827ab 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiPullRequestControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiPullRequestControllerBase.scala
@@ -8,10 +8,10 @@
 import gitbucket.core.util.Directory.getRepositoryDir
 import gitbucket.core.util.Implicits._
 import gitbucket.core.util.JGitUtil.CommitInfo
-import gitbucket.core.util.SyntaxSugars.using
 import gitbucket.core.util._
 import org.eclipse.jgit.api.Git
 import org.scalatra.NoContent
+import scala.util.Using
 
 import scala.jdk.CollectionConverters._
 
@@ -173,7 +173,7 @@
       issueId =>
         getPullRequest(owner, name, issueId) map {
           case (issue, pullreq) =>
-            using(Git.open(getRepositoryDir(owner, name))) { git =>
+            Using.resource(Git.open(getRepositoryDir(owner, name))) { git =>
               val oldId = git.getRepository.resolve(pullreq.commitIdFrom)
               val newId = git.getRepository.resolve(pullreq.commitIdTo)
               val repoFullName = RepositoryName(repository)
diff --git a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryContentsControllerBase.scala b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryContentsControllerBase.scala
index 07cd144..edcefc4 100644
--- a/src/main/scala/gitbucket/core/controller/api/ApiRepositoryContentsControllerBase.scala
+++ b/src/main/scala/gitbucket/core/controller/api/ApiRepositoryContentsControllerBase.scala
@@ -5,10 +5,10 @@
 import gitbucket.core.util.Directory.getRepositoryDir
 import gitbucket.core.util.JGitUtil.{FileInfo, getContentFromId, getFileList}
 import gitbucket.core.util._
-import gitbucket.core.util.SyntaxSugars.using
 import gitbucket.core.view.helpers.{isRenderable, renderMarkup}
 import gitbucket.core.util.Implicits._
 import org.eclipse.jgit.api.Git
+import scala.util.Using
 
 trait ApiRepositoryContentsControllerBase extends ControllerBase {
   self: ReferrerAuthenticator with WritableUsersAuthenticator with RepositoryCommitFileService =>
@@ -45,7 +45,7 @@
       getFileList(git, revision, dirName).find(f => f.name.equals(fileName))
     }
 
-    using(Git.open(getRepositoryDir(params("owner"), params("repository")))) { git =>
+    Using.resource(Git.open(getRepositoryDir(params("owner"), params("repository")))) { git =>
       val fileList = getFileList(git, refStr, path)
       if (fileList.isEmpty) { // file or NotFound
         getFileInfo(git, refStr, path)
@@ -113,7 +113,7 @@
       data <- extractFromJsonBody[CreateAFile]
     } yield {
       val branch = data.branch.getOrElse(repository.repository.defaultBranch)
-      val commit = using(Git.open(getRepositoryDir(repository.owner, repository.name))) { git =>
+      val commit = Using.resource(Git.open(getRepositoryDir(repository.owner, repository.name))) { git =>
         val revCommit = JGitUtil.getRevCommitFromId(git, git.getRepository.resolve(branch))
         revCommit.name
       }
diff --git a/src/main/scala/gitbucket/core/service/RepositoryCreationService.scala b/src/main/scala/gitbucket/core/service/RepositoryCreationService.scala
index 8e7a662..c72e85b 100644
--- a/src/main/scala/gitbucket/core/service/RepositoryCreationService.scala
+++ b/src/main/scala/gitbucket/core/service/RepositoryCreationService.scala
@@ -4,7 +4,6 @@
 import java.util.concurrent.ConcurrentHashMap
 
 import gitbucket.core.model.Profile.profile.blockingApi._
-import gitbucket.core.util.SyntaxSugars._
 import gitbucket.core.util.Directory._
 import gitbucket.core.util.{FileUtil, JGitUtil, LockUtil}
 import gitbucket.core.model.{Account, Role}
@@ -18,6 +17,7 @@
 
 import scala.concurrent.ExecutionContext.Implicits.global
 import scala.concurrent.Future
+import scala.util.Using
 
 object RepositoryCreationService {
 
@@ -107,7 +107,7 @@
         JGitUtil.initRepository(gitdir)
 
         if (initOption == "README" || initOption == "EMPTY_COMMIT") {
-          using(Git.open(gitdir)) { git =>
+          Using.resource(Git.open(gitdir)) { git =>
             val builder = DirCache.newInCore.builder()
             val inserter = git.getRepository.newObjectInserter()
             val headId = git.getRepository.resolve(Constants.HEAD + "^{commit}")
@@ -148,7 +148,7 @@
 
         copyRepositoryDir.foreach { dir =>
           try {
-            using(Git.open(dir)) { git =>
+            Using.resource(Git.open(dir)) { git =>
               git.push().setRemote(gitdir.toURI.toString).setPushAll().setPushTags().call()
             }
           } finally {