diff --git a/build.sbt b/build.sbt
index a3e522d..b7ee701 100644
--- a/build.sbt
+++ b/build.sbt
@@ -22,8 +22,8 @@
 )
 libraryDependencies ++= Seq(
   "org.scala-lang.modules"   %% "scala-java8-compat"           % "0.7.0",
-  "org.eclipse.jgit"          % "org.eclipse.jgit.http.server" % "4.1.2.201602141800-r",
-  "org.eclipse.jgit"          % "org.eclipse.jgit.archive"     % "4.1.2.201602141800-r",
+  "org.eclipse.jgit"          % "org.eclipse.jgit.http.server" % "4.6.0.201612231935-r",
+  "org.eclipse.jgit"          % "org.eclipse.jgit.archive"     % "4.6.0.201612231935-r",
   "org.scalatra"             %% "scalatra"                     % ScalatraVersion,
   "org.scalatra"             %% "scalatra-json"                % ScalatraVersion,
   "org.json4s"               %% "json4s-jackson"               % "3.3.0",
diff --git a/src/main/scala/gitbucket/core/controller/ApiController.scala b/src/main/scala/gitbucket/core/controller/ApiController.scala
index d118fa4..19d5bbf 100644
--- a/src/main/scala/gitbucket/core/controller/ApiController.scala
+++ b/src/main/scala/gitbucket/core/controller/ApiController.scala
@@ -175,7 +175,7 @@
     using(Git.open(getRepositoryDir(params("owner"), params("repo")))) { git =>
       //JsonFormat( (revstr, git.getRepository().resolve(revstr)) )
       // getRef is deprecated by jgit-4.2. use exactRef() or findRef()
-      val sha = git.getRepository().getRef(revstr).getObjectId().name()
+      val sha = git.getRepository().exactRef(revstr).getObjectId().name()
       JsonFormat(ApiRef(revstr, ApiObject(sha)))
     }
   })