diff --git a/pom.xml b/pom.xml
index 44198d1..67db036 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,13 +20,13 @@
   <modelVersion>4.0.0</modelVersion>
   <artifactId>branch-network</artifactId>
   <groupId>com.googlesource.gerrit.plugins.branchnetwork</groupId>
-  <version>1.0-SNAPSHOT</version>
+  <version>2.12-rc0</version>
   <name>Gerrit - Branch network display plugin</name>
   <url>http://maven.apache.org</url>
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <Gerrit-ApiType>plugin</Gerrit-ApiType>
-    <Gerrit-ApiVersion>2.9-SNAPSHOT</Gerrit-ApiVersion>
+    <Gerrit-ApiVersion>${project.version}</Gerrit-ApiVersion>
     <Gerrit-ReloadMode>reload</Gerrit-ReloadMode>
     <Gerrit-Module>com.googlesource.gerrit.plugins.branchnetwork.GitCommitCacheModule</Gerrit-Module>
     <Gerrit-HttpModule>com.googlesource.gerrit.plugins.branchnetwork.NetworkGraphModule</Gerrit-HttpModule>
@@ -52,8 +52,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>2.5.1</version>
         <configuration>
-          <source>1.6</source>
-          <target>1.6</target>
+          <source>1.7</source>
+          <target>1.7</target>
         </configuration>
       </plugin>
       <plugin>
diff --git a/src/main/java/com/googlesource/gerrit/plugins/branchnetwork/data/JGitFacade.java b/src/main/java/com/googlesource/gerrit/plugins/branchnetwork/data/JGitFacade.java
index f0f0ab8..f0395b3 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/branchnetwork/data/JGitFacade.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/branchnetwork/data/JGitFacade.java
@@ -166,11 +166,8 @@
   }
 
   public int getBranchesPlotLanesCount(String repoName) throws IOException {
-    final Repository repo =
-        repoManager.openRepository(NameKey.parse(repoName));
-    final PlotWalk walk = new PlotWalk(repo);
-
-    try {
+    try (Repository repo = repoManager.openRepository(NameKey.parse(repoName));
+         PlotWalk walk = new PlotWalk(repo);) {
       ObjectId headId = repo.resolve(Constants.HEAD);
       if (headId == null) return 0;
 
@@ -188,9 +185,6 @@
       }
 
       return maxLane;
-    } finally {
-      walk.dispose();
-      repo.close();
     }
   }
 }