diff --git a/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala b/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
index 1b4ecc9..896ec82 100644
--- a/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
+++ b/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
@@ -232,7 +232,7 @@
       oldFileName = form.oldFileName,
       content     = appendNewLine(convertLineSeparator(form.content, form.lineSeparator), form.lineSeparator),
       charset     = form.charset,
-      message     = if(form.oldFileName.exists(_ == form.newFileName)){
+      message     = if(form.oldFileName.contains(form.newFileName)){
         form.message.getOrElse(s"Update ${form.newFileName}")
       } else {
         form.message.getOrElse(s"Rename ${form.oldFileName.get} to ${form.newFileName}")
@@ -614,7 +614,7 @@
 
         val permission = JGitUtil.processTree(git, headTip){ (path, tree) =>
           // Add all entries except the editing file
-          if(!newPath.exists(_ == path) && !oldPath.exists(_ == path)){
+          if(!newPath.contains(path) && !oldPath.contains(path)){
             builder.add(JGitUtil.createDirCacheEntry(path, tree.getEntryFileMode, tree.getEntryObjectId))
           }
           // Retrieve permission if file exists to keep it
diff --git a/src/main/scala/gitbucket/core/service/PullRequestService.scala b/src/main/scala/gitbucket/core/service/PullRequestService.scala
index 3807e55..03f2e6e 100644
--- a/src/main/scala/gitbucket/core/service/PullRequestService.scala
+++ b/src/main/scala/gitbucket/core/service/PullRequestService.scala
@@ -265,7 +265,7 @@
       val summary = stateMap.map{ case (keyState, states) => states.size+" "+keyState.name }.mkString(", ")
       state -> summary
     }
-    lazy val statusesAndRequired:List[(CommitStatus, Boolean)] = statuses.map{ s => s -> branchProtection.contexts.exists(_==s.context) }
+    lazy val statusesAndRequired:List[(CommitStatus, Boolean)] = statuses.map{ s => s -> branchProtection.contexts.contains(s.context) }
     lazy val isAllSuccess = commitStateSummary._1==CommitState.SUCCESS
   }
 }
diff --git a/src/main/scala/gitbucket/core/ssh/GitCommand.scala b/src/main/scala/gitbucket/core/ssh/GitCommand.scala
index 9461803..0629c14 100644
--- a/src/main/scala/gitbucket/core/ssh/GitCommand.scala
+++ b/src/main/scala/gitbucket/core/ssh/GitCommand.scala
@@ -105,7 +105,7 @@
         }
       }
       case AuthType.DeployKeyType(key) => {
-        getDeployKeys(owner, repoName).filter(sshKey => SshUtil.str2PublicKey(sshKey.publicKey).exists(_ == key)) match {
+        getDeployKeys(owner, repoName).filter(sshKey => SshUtil.str2PublicKey(sshKey.publicKey).contains(key)) match {
           case List(_) => true
           case _ => false
         }
@@ -123,7 +123,7 @@
         }
       }
       case AuthType.DeployKeyType(key) => {
-        getDeployKeys(owner, repoName).filter(sshKey => SshUtil.str2PublicKey(sshKey.publicKey).exists(_ == key)) match {
+        getDeployKeys(owner, repoName).filter(sshKey => SshUtil.str2PublicKey(sshKey.publicKey).contains(key)) match {
           case List(x) if x.allowWrite => true
           case _ => false
         }
diff --git a/src/main/scala/gitbucket/core/ssh/PublicKeyAuthenticator.scala b/src/main/scala/gitbucket/core/ssh/PublicKeyAuthenticator.scala
index 814e3e9..e3be40d 100644
--- a/src/main/scala/gitbucket/core/ssh/PublicKeyAuthenticator.scala
+++ b/src/main/scala/gitbucket/core/ssh/PublicKeyAuthenticator.scala
@@ -68,7 +68,7 @@
   private def authenticateGenericUser(userName: String, key: PublicKey, session: ServerSession, genericUser: String)(implicit s: Session): Boolean = {
     // find all users having the key we got from ssh
     val possibleUserNames = getAllKeys().filter { sshKey =>
-      SshUtil.str2PublicKey(sshKey.publicKey).exists(_ == key)
+      SshUtil.str2PublicKey(sshKey.publicKey).contains(key)
     }.map(_.userName).distinct
 
     // determine the user - if different accounts share the same key, tough luck
@@ -85,7 +85,7 @@
     }.getOrElse {
       // search deploy keys
       val existsDeployKey = getAllDeployKeys().exists { sshKey =>
-        SshUtil.str2PublicKey(sshKey.publicKey).exists(_ == key)
+        SshUtil.str2PublicKey(sshKey.publicKey).contains(key)
       }
       if(existsDeployKey){
         // found deploy key for repository