diff --git a/checkstyle.xml b/checkstyle.xml
index 100a56f482..8227920e8c 100644
--- a/checkstyle.xml
+++ b/checkstyle.xml
@@ -18,7 +18,7 @@
 <module name="Checker">
     <property name="charset" value="UTF-8"/>
 
-    <property name="severity" value="warning"/>
+    <property name="severity" value="error"/>
 
     <property name="fileExtensions" value="java, properties, xml"/>
     <!-- Checks for whitespace                               -->
diff --git a/pom.xml b/pom.xml
index 397f081585..f8663c0fe7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -95,10 +95,10 @@ Copyright 2014-2016 CyberVision, Inc.
         <metrics.version>3.1.0</metrics.version>
 
         <findbugs.version>2.5.2</findbugs.version>
-        <checkstyle.version>2.17</checkstyle.version>
+        <checkstyle.version>2.12</checkstyle.version>
         <checkstyle.tools.version>7.0</checkstyle.tools.version>
-        <checkstyle.exclusions>**/gen/**, **/target/**, **/org/kaaproject/kaa/schema/**,
-            **/org/kaaproject/kaa/common/dto/ctl/**</checkstyle.exclusions>
+        <checkstyle.exclusions>**/gen/**, ^target/generated-sources, **/org/kaaproject/kaa/schema/**,
+            **/org/kaaproject/kaa/common/dto/ctl/**, **/org/kaaproject/kaa/server/common/Version.java</checkstyle.exclusions>
         <rat.version>0.10</rat.version>
         <javassist.version>3.18.1-GA</javassist.version>
         <signpost-core.version>1.2.1.2</signpost-core.version>
diff --git a/server/node/src/main/java/org/kaaproject/kaa/server/operations/service/akka/messages/core/endpoint/SyncRequestMessage.java b/server/node/src/main/java/org/kaaproject/kaa/server/operations/service/akka/messages/core/endpoint/SyncRequestMessage.java
index 4052698a44..3a407a03c1 100644
--- a/server/node/src/main/java/org/kaaproject/kaa/server/operations/service/akka/messages/core/endpoint/SyncRequestMessage.java
+++ b/server/node/src/main/java/org/kaaproject/kaa/server/operations/service/akka/messages/core/endpoint/SyncRequestMessage.java
@@ -111,7 +111,7 @@ public Message getCommand() {
   /**
    * Updates a request.
    */
-  public void updateRequest() {
+  public void updateRequest(ServerSync response) {
     UUID channelUuid = getChannelUuid();
     LOG.debug("[{}] Cleanup profile request", channelUuid);
     request.setProfileSync(null);