diff --git a/src/main/resources/update/1_13.sql b/src/main/resources/update/1_13.sql
new file mode 100644
index 0000000..ed26f65
--- /dev/null
+++ b/src/main/resources/update/1_13.sql
@@ -0,0 +1 @@
+DROP TABLE COMMIT_LOG;
\ No newline at end of file
diff --git a/src/main/scala/servlet/AutoUpdateListener.scala b/src/main/scala/servlet/AutoUpdateListener.scala
index 8cafb60..9ffed83 100644
--- a/src/main/scala/servlet/AutoUpdateListener.scala
+++ b/src/main/scala/servlet/AutoUpdateListener.scala
@@ -50,6 +50,7 @@
    * The history of versions. A head of this sequence is the current BitBucket version.
    */
   val versions = Seq(
+    Version(1, 13),
     Version(1, 12),
     Version(1, 11),
     Version(1, 10),
diff --git a/src/main/scala/util/JGitUtil.scala b/src/main/scala/util/JGitUtil.scala
index cd82de0..ed58555 100644
--- a/src/main/scala/util/JGitUtil.scala
+++ b/src/main/scala/util/JGitUtil.scala
@@ -573,7 +573,9 @@
   /**
    * Returns all commit id in the specified repository.
    */
-  def getAllCommitIds(git: Git): Seq[String] = {
+  def getAllCommitIds(git: Git): Seq[String] = if(isEmpty(git)) {
+    Nil
+  } else {
     val existIds = new scala.collection.mutable.ListBuffer[String]()
     val i = git.log.all.call.iterator
     while(i.hasNext){