diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8ac29d..ecfed8f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 # Changelog
 All changes to the project will be documented in this file.
 
+### 4.23.1 - 10 Apr 2018
+- Fix bug that the contents API doesn't work for the repository root
+- Fix shutdown problem in Tomcat deployment
+- Render by plugins at the blob view even if it's a binary file
+
 ### 4.23.0 - 31 Mar 2018
 - Allow tail slash in URL
 - Display commit message of tags at the releases page
diff --git a/README.md b/README.md
index e74498d..59c0b07 100644
--- a/README.md
+++ b/README.md
@@ -70,6 +70,11 @@
 
 What's New in 4.23.x
 -------------
+### 4.23.1 - 10 Apr 2018
+- Fix bug that the contents API doesn't work for the repository root
+- Fix shutdown problem in Tomcat deployment
+- Render by plugins at the blob view even if it's a binary file
+
 ### 4.23.0 - 31 Mar 2018
 - Allow tail slash in URL
 - Display commit message of tags at the releases page
diff --git a/build.sbt b/build.sbt
index 4b6145e..10723d9 100644
--- a/build.sbt
+++ b/build.sbt
@@ -3,7 +3,7 @@
 
 val Organization = "io.github.gitbucket"
 val Name = "gitbucket"
-val GitBucketVersion = "4.23.0"
+val GitBucketVersion = "4.23.1"
 val ScalatraVersion = "2.6.1"
 val JettyVersion = "9.4.7.v20170914"
 
diff --git a/project/build.properties b/project/build.properties
index 0531343..609a2d1 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.1.2
+sbt.version=1.1.3
diff --git a/src/main/scala/gitbucket/core/GitBucketCoreModule.scala b/src/main/scala/gitbucket/core/GitBucketCoreModule.scala
index fb0bad1..656bc98 100644
--- a/src/main/scala/gitbucket/core/GitBucketCoreModule.scala
+++ b/src/main/scala/gitbucket/core/GitBucketCoreModule.scala
@@ -51,5 +51,7 @@
       new Version("4.21.2"),
       new Version("4.22.0", new LiquibaseMigration("update/gitbucket-core_4.22.xml")),
       new Version("4.23.0", new LiquibaseMigration("update/gitbucket-core_4.23.xml")),
+      new Version("4.23.0", new LiquibaseMigration("update/gitbucket-core_4.23.xml")),
+      new Version("4.23.1")
       new Version("4.24.0", new LiquibaseMigration("update/gitbucket-core_4.24.xml"))
     )
diff --git a/src/main/scala/gitbucket/core/controller/ApiController.scala b/src/main/scala/gitbucket/core/controller/ApiController.scala
index 1cf042d..79fd56e 100644
--- a/src/main/scala/gitbucket/core/controller/ApiController.scala
+++ b/src/main/scala/gitbucket/core/controller/ApiController.scala
@@ -161,7 +161,18 @@
   /*
    * https://developer.github.com/v3/repos/contents/#get-contents
    */
+  get("/api/v3/repos/:owner/:repo/contents")(referrersOnly { repository =>
+    getContents(repository, ".", params.getOrElse("ref", repository.repository.defaultBranch))
+  })
+
+  /*
+   * https://developer.github.com/v3/repos/contents/#get-contents
+   */
   get("/api/v3/repos/:owner/:repo/contents/*")(referrersOnly { repository =>
+    getContents(repository, multiParams("splat").head, params.getOrElse("ref", repository.repository.defaultBranch))
+  })
+
+  private def getContents(repository: RepositoryService.RepositoryInfo, path: String, refStr: String) = {
     def getFileInfo(git: Git, revision: String, pathStr: String): Option[FileInfo] = {
       val (dirName, fileName) = pathStr.lastIndexOf('/') match {
         case -1 =>
@@ -172,69 +183,61 @@
       getFileList(git, revision, dirName).find(f => f.name.equals(fileName))
     }
 
-    val path = multiParams("splat").head match {
-      case s if s.isEmpty => "."
-      case s              => s
-    }
-    val refStr = params.getOrElse("ref", repository.repository.defaultBranch)
-
-    using(Git.open(getRepositoryDir(params("owner"), params("repo")))) {
-      git =>
-        val fileList = getFileList(git, refStr, path)
-        if (fileList.isEmpty) { // file or NotFound
-          getFileInfo(git, refStr, path)
-            .flatMap(f => {
-              val largeFile = params.get("large_file").exists(s => s.equals("true"))
-              val content = getContentFromId(git, f.id, largeFile)
-              request.getHeader("Accept") match {
-                case "application/vnd.github.v3.raw" => {
-                  contentType = "application/vnd.github.v3.raw"
-                  content
-                }
-                case "application/vnd.github.v3.html" if isRenderable(f.name) => {
-                  contentType = "application/vnd.github.v3.html"
-                  content.map(
-                    c =>
-                      List(
-                        "<div data-path=\"",
-                        path,
-                        "\" id=\"file\">",
-                        "<article>",
-                        renderMarkup(path.split("/").toList, new String(c), refStr, repository, false, false, true).body,
-                        "</article>",
-                        "</div>"
-                      ).mkString
-                  )
-                }
-                case "application/vnd.github.v3.html" => {
-                  contentType = "application/vnd.github.v3.html"
-                  content.map(
-                    c =>
-                      List(
-                        "<div data-path=\"",
-                        path,
-                        "\" id=\"file\">",
-                        "<div class=\"plain\">",
-                        "<pre>",
-                        play.twirl.api.HtmlFormat.escape(new String(c)).body,
-                        "</pre>",
-                        "</div>",
-                        "</div>"
-                      ).mkString
-                  )
-                }
-                case _ =>
-                  Some(JsonFormat(ApiContents(f, RepositoryName(repository), content)))
+    using(Git.open(getRepositoryDir(params("owner"), params("repo")))) { git =>
+      val fileList = getFileList(git, refStr, path)
+      if (fileList.isEmpty) { // file or NotFound
+        getFileInfo(git, refStr, path)
+          .flatMap { f =>
+            val largeFile = params.get("large_file").exists(s => s.equals("true"))
+            val content = getContentFromId(git, f.id, largeFile)
+            request.getHeader("Accept") match {
+              case "application/vnd.github.v3.raw" => {
+                contentType = "application/vnd.github.v3.raw"
+                content
               }
-            })
-            .getOrElse(NotFound())
-        } else { // directory
-          JsonFormat(fileList.map { f =>
-            ApiContents(f, RepositoryName(repository), None)
-          })
-        }
+              case "application/vnd.github.v3.html" if isRenderable(f.name) => {
+                contentType = "application/vnd.github.v3.html"
+                content.map { c =>
+                  List(
+                    "<div data-path=\"",
+                    path,
+                    "\" id=\"file\">",
+                    "<article>",
+                    renderMarkup(path.split("/").toList, new String(c), refStr, repository, false, false, true).body,
+                    "</article>",
+                    "</div>"
+                  ).mkString
+                }
+              }
+              case "application/vnd.github.v3.html" => {
+                contentType = "application/vnd.github.v3.html"
+                content.map { c =>
+                  List(
+                    "<div data-path=\"",
+                    path,
+                    "\" id=\"file\">",
+                    "<div class=\"plain\">",
+                    "<pre>",
+                    play.twirl.api.HtmlFormat.escape(new String(c)).body,
+                    "</pre>",
+                    "</div>",
+                    "</div>"
+                  ).mkString
+                }
+              }
+              case _ =>
+                Some(JsonFormat(ApiContents(f, RepositoryName(repository), content)))
+            }
+          }
+          .getOrElse(NotFound())
+
+      } else { // directory
+        JsonFormat(fileList.map { f =>
+          ApiContents(f, RepositoryName(repository), None)
+        })
+      }
     }
-  })
+  }
 
   /*
    * https://developer.github.com/v3/git/refs/#get-a-reference
diff --git a/src/main/twirl/gitbucket/core/repo/editor.scala.html b/src/main/twirl/gitbucket/core/repo/editor.scala.html
index 554a85a..9b984fe 100644
--- a/src/main/twirl/gitbucket/core/repo/editor.scala.html
+++ b/src/main/twirl/gitbucket/core/repo/editor.scala.html
@@ -82,7 +82,11 @@
   $('#editor').text($('#initial').val());
   var editor = ace.edit("editor");
   editor.setTheme("ace/theme/monokai");
-  //editor.getSession().setUseWrapMode(false);
+
+  if(localStorage.getItem('gitbucket:editor:wrap') == 'true'){
+    editor.getSession().setUseWrapMode(true);
+    $('#wrap').val('true');
+  }
 
   @if(fileName.isDefined){
     editor.getSession().setMode("ace/mode/@helpers.editorType(fileName.get)");
@@ -106,8 +110,10 @@
   $('#wrap').change(function(){
     if($('#wrap option:selected').val() == 'true'){
       editor.getSession().setUseWrapMode(true);
+      localStorage.setItem('gitbucket:editor:wrap', 'true');
     } else {
       editor.getSession().setUseWrapMode(false);
+      localStorage.setItem('gitbucket:editor:wrap', 'false');
     }
   });