diff --git a/com.avaloq.tools.ddk.check.core/src/com/avaloq/tools/ddk/check/resource/CheckBatchLinkableResourceStorageWritable.java b/com.avaloq.tools.ddk.check.core/src/com/avaloq/tools/ddk/check/resource/CheckBatchLinkableResourceStorageWritable.java
index 34815bea2..fbcc51ba0 100644
--- a/com.avaloq.tools.ddk.check.core/src/com/avaloq/tools/ddk/check/resource/CheckBatchLinkableResourceStorageWritable.java
+++ b/com.avaloq.tools.ddk.check.core/src/com/avaloq/tools/ddk/check/resource/CheckBatchLinkableResourceStorageWritable.java
@@ -60,7 +60,7 @@ protected void writeEntries(final StorageAwareResource resource, final ZipOutput
     ZipEntry zipEntry;
 
     // Adapted from the ResourceStorageWritable base class
-    BufferedOutputStream bufferedOutput = new BufferedOutputStream(zipOut);
+    final BufferedOutputStream bufferedOutput = new BufferedOutputStream(zipOut);
 
     zipEntry = new ZipEntry("emf-contents");
     zipEntry.setTime(CONSTANT_DATETIME_MILLIS); // Unique to this class
diff --git a/ddk-parent/pom.xml b/ddk-parent/pom.xml
index 6175f0cc5..a8117fb97 100644
--- a/ddk-parent/pom.xml
+++ b/ddk-parent/pom.xml
@@ -47,7 +47,7 @@
 
     <!-- maven plugin versions -->
     <checkstyle.plugin.version>3.6.0</checkstyle.plugin.version>
-    <checkstyle.version>13.4.0</checkstyle.version>
+    <checkstyle.version>13.4.1</checkstyle.version>
     <clean.version>3.5.0</clean.version>
     <deploy.version>3.1.4</deploy.version>
     <spotbugs.plugin.version>4.9.8.3</spotbugs.plugin.version>