diff --git a/examples/embedded-war/src/main/java/org/apache/vysper/xmpp/exemples/embeddedwar/StatusServlet.java b/examples/embedded-war/src/main/java/org/apache/vysper/xmpp/exemples/embeddedwar/StatusServlet.java
index e37fb38..f06865a 100644
--- a/examples/embedded-war/src/main/java/org/apache/vysper/xmpp/exemples/embeddedwar/StatusServlet.java
+++ b/examples/embedded-war/src/main/java/org/apache/vysper/xmpp/exemples/embeddedwar/StatusServlet.java
@@ -1,3 +1,22 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ *
+ */
 package org.apache.vysper.xmpp.exemples.embeddedwar;
 
 import java.io.IOException;
diff --git a/examples/embedded-war/src/main/java/org/apache/vysper/xmpp/exemples/embeddedwar/VysperListener.java b/examples/embedded-war/src/main/java/org/apache/vysper/xmpp/exemples/embeddedwar/VysperListener.java
index 09765de..038cd80 100644
--- a/examples/embedded-war/src/main/java/org/apache/vysper/xmpp/exemples/embeddedwar/VysperListener.java
+++ b/examples/embedded-war/src/main/java/org/apache/vysper/xmpp/exemples/embeddedwar/VysperListener.java
@@ -1,3 +1,22 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ *
+ */
 package org.apache.vysper.xmpp.exemples.embeddedwar;
 
 import javax.servlet.ServletContextEvent;
diff --git a/server/core-inttest/src/test/java/org/apache/vysper/xmpp/server/s2s/RunS2SServers.java b/server/core-inttest/src/test/java/org/apache/vysper/xmpp/server/s2s/RunS2SServers.java
index f0a1c4c..939bcb7 100644
--- a/server/core-inttest/src/test/java/org/apache/vysper/xmpp/server/s2s/RunS2SServers.java
+++ b/server/core-inttest/src/test/java/org/apache/vysper/xmpp/server/s2s/RunS2SServers.java
@@ -1,3 +1,22 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ *
+ */
 package org.apache.vysper.xmpp.server.s2s;
 
 import java.io.File;
diff --git a/server/core/src/main/java/org/apache/vysper/xmpp/delivery/inbound/RelayResult.java b/server/core/src/main/java/org/apache/vysper/xmpp/delivery/inbound/RelayResult.java
index 6165dee..a7353c6 100644
--- a/server/core/src/main/java/org/apache/vysper/xmpp/delivery/inbound/RelayResult.java
+++ b/server/core/src/main/java/org/apache/vysper/xmpp/delivery/inbound/RelayResult.java
@@ -1,3 +1,22 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ *
+ */
 package org.apache.vysper.xmpp.delivery.inbound;
 
 import java.util.ArrayList;
diff --git a/server/core/src/main/java/org/apache/vysper/xmpp/modules/extension/xep0119_xmppping/XmppPingListener.java b/server/core/src/main/java/org/apache/vysper/xmpp/modules/extension/xep0119_xmppping/XmppPingListener.java
index c2d19f5..dd21101 100644
--- a/server/core/src/main/java/org/apache/vysper/xmpp/modules/extension/xep0119_xmppping/XmppPingListener.java
+++ b/server/core/src/main/java/org/apache/vysper/xmpp/modules/extension/xep0119_xmppping/XmppPingListener.java
@@ -1,3 +1,22 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ *
+ */
 package org.apache.vysper.xmpp.modules.extension.xep0119_xmppping;
 
 public interface XmppPingListener {
diff --git a/server/core/src/main/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DialbackIdGenerator.java b/server/core/src/main/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DialbackIdGenerator.java
index 3e9e4bc..8b0eacd 100644
--- a/server/core/src/main/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DialbackIdGenerator.java
+++ b/server/core/src/main/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DialbackIdGenerator.java
@@ -1,3 +1,22 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ *
+ */
 package org.apache.vysper.xmpp.modules.extension.xep0220_server_dailback;
 import java.io.UnsupportedEncodingException;
 import java.security.InvalidKeyException;
diff --git a/server/core/src/test/java/org/apache/vysper/xmpp/delivery/inbound/RecordingDeliveryFailureStrategy.java b/server/core/src/test/java/org/apache/vysper/xmpp/delivery/inbound/RecordingDeliveryFailureStrategy.java
index 328e262..a344b66 100644
--- a/server/core/src/test/java/org/apache/vysper/xmpp/delivery/inbound/RecordingDeliveryFailureStrategy.java
+++ b/server/core/src/test/java/org/apache/vysper/xmpp/delivery/inbound/RecordingDeliveryFailureStrategy.java
@@ -1,3 +1,22 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ *
+ */
 package org.apache.vysper.xmpp.delivery.inbound;
 
 import java.util.List;
diff --git a/server/core/src/test/java/org/apache/vysper/xmpp/delivery/inbound/TestExecutorService.java b/server/core/src/test/java/org/apache/vysper/xmpp/delivery/inbound/TestExecutorService.java
index 6a2ddd5..3eb725c 100644
--- a/server/core/src/test/java/org/apache/vysper/xmpp/delivery/inbound/TestExecutorService.java
+++ b/server/core/src/test/java/org/apache/vysper/xmpp/delivery/inbound/TestExecutorService.java
@@ -1,3 +1,22 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ *
+ */
 package org.apache.vysper.xmpp.delivery.inbound;
 
 import java.util.Collections;
diff --git a/server/core/src/test/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DbVerifyHandlerTestCase.java b/server/core/src/test/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DbVerifyHandlerTestCase.java
index 2000edf..b50912a 100644
--- a/server/core/src/test/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DbVerifyHandlerTestCase.java
+++ b/server/core/src/test/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DbVerifyHandlerTestCase.java
@@ -1,3 +1,22 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ *
+ */
 package org.apache.vysper.xmpp.modules.extension.xep0220_server_dailback;
 import junit.framework.Assert;
 import junit.framework.TestCase;
diff --git a/server/core/src/test/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DialbackIdGeneratorTestCase.java b/server/core/src/test/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DialbackIdGeneratorTestCase.java
index 40f767b..2cf6f8a 100644
--- a/server/core/src/test/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DialbackIdGeneratorTestCase.java
+++ b/server/core/src/test/java/org/apache/vysper/xmpp/modules/extension/xep0220_server_dailback/DialbackIdGeneratorTestCase.java
@@ -1,3 +1,22 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ *
+ */
 package org.apache.vysper.xmpp.modules.extension.xep0220_server_dailback;
 import junit.framework.Assert;
 import junit.framework.TestCase;
diff --git a/server/core/src/test/java/org/apache/vysper/xmpp/server/s2s/Server2Server.java b/server/core/src/test/java/org/apache/vysper/xmpp/server/s2s/Server2Server.java
index e3ccfb8..839c216 100644
--- a/server/core/src/test/java/org/apache/vysper/xmpp/server/s2s/Server2Server.java
+++ b/server/core/src/test/java/org/apache/vysper/xmpp/server/s2s/Server2Server.java
@@ -1,3 +1,22 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ *
+ */
 package org.apache.vysper.xmpp.server.s2s;
 import java.io.File;
 
diff --git a/server/extensions/websockets/pom.xml b/server/extensions/websockets/pom.xml
index b207cfd..036cf30 100644
--- a/server/extensions/websockets/pom.xml
+++ b/server/extensions/websockets/pom.xml
@@ -93,6 +93,26 @@
 					</execution>
 				</executions>
 			</plugin>
+            <plugin>
+              <groupId>org.codehaus.mojo</groupId>
+              <artifactId>rat-maven-plugin</artifactId>
+              <version>1.0-alpha-3</version>
+              <executions>
+                <execution>
+                  <id>verify-licenses</id>
+                  <phase>verify</phase>
+                  <goals>
+                    <goal>check</goal>
+                  </goals>
+                </execution>
+              </executions>
+  			<configuration>
+  				<excludes>
+  					<exclude>**/*.txt</exclude>
+  				</excludes>
+  			</configuration>
+            </plugin>
+
 		</plugins>
 	</build>
 </project>
diff --git a/server/extensions/websockets/src/examples/client/client.html b/server/extensions/websockets/src/examples/client/client.html
index 73c7184..a544438 100644
--- a/server/extensions/websockets/src/examples/client/client.html
+++ b/server/extensions/websockets/src/examples/client/client.html
@@ -1,3 +1,13 @@
+<!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor 
+	license agreements. See the NOTICE file distributed with this work for additional 
+	information regarding copyright ownership. The ASF licenses this file to 
+	you under the Apache License, Version 2.0 (the "License"); you may not use 
+	this file except in compliance with the License. You may obtain a copy of 
+	the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required 
+	by applicable law or agreed to in writing, software distributed under the 
+	License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS 
+	OF ANY KIND, either express or implied. See the License for the specific 
+	language governing permissions and limitations under the License. -->
 <html>
 	<head>
 	<script>