diff --git a/src/main/scala/app/AccountController.scala b/src/main/scala/app/AccountController.scala
index 68b2d53..3453055 100644
--- a/src/main/scala/app/AccountController.scala
+++ b/src/main/scala/app/AccountController.scala
@@ -1,11 +1,10 @@
 package app
 
 import service._
-import util.{FileUtil, FileUploadUtil, OneselfAuthenticator}
+import util.{FileUtil, OneselfAuthenticator}
 import util.StringUtil._
 import util.Directory._
 import jp.sf.amateras.scalatra.forms._
-import org.apache.commons.io.FileUtils
 import org.scalatra.FlashMapSupport
 
 class AccountController extends AccountControllerBase
diff --git a/src/main/scala/app/CreateRepositoryController.scala b/src/main/scala/app/CreateRepositoryController.scala
index e10e5bb..1461a09 100644
--- a/src/main/scala/app/CreateRepositoryController.scala
+++ b/src/main/scala/app/CreateRepositoryController.scala
@@ -5,7 +5,6 @@
 import service._
 import java.io.File
 import org.eclipse.jgit.api.Git
-import org.eclipse.jgit.lib._
 import org.apache.commons.io._
 import jp.sf.amateras.scalatra.forms._
 
diff --git a/src/main/scala/app/MilestonesController.scala b/src/main/scala/app/MilestonesController.scala
index 55c60d0..f4ae4cb 100644
--- a/src/main/scala/app/MilestonesController.scala
+++ b/src/main/scala/app/MilestonesController.scala
@@ -3,7 +3,7 @@
 import jp.sf.amateras.scalatra.forms._
 
 import service._
-import util.{CollaboratorsAuthenticator, ReferrerAuthenticator, UsersAuthenticator}
+import util.{CollaboratorsAuthenticator, ReferrerAuthenticator}
 
 class MilestonesController extends MilestonesControllerBase
   with MilestonesService with RepositoryService with AccountService
diff --git a/src/main/scala/app/UserManagementController.scala b/src/main/scala/app/UserManagementController.scala
index e5673d4..363744f 100644
--- a/src/main/scala/app/UserManagementController.scala
+++ b/src/main/scala/app/UserManagementController.scala
@@ -1,12 +1,9 @@
 package app
 
 import service._
-import util.{FileUploadUtil, FileUtil, AdminAuthenticator}
+import util.AdminAuthenticator
 import util.StringUtil._
 import jp.sf.amateras.scalatra.forms._
-import org.apache.commons.io.FileUtils
-import util.Directory._
-import scala.Some
 
 class UserManagementController extends UserManagementControllerBase with AccountService with AdminAuthenticator