diff --git a/src/main/assembly/bin.xml b/src/main/assembly/bin.xml
index 5172b82..2cc4fe3 100644
--- a/src/main/assembly/bin.xml
+++ b/src/main/assembly/bin.xml
@@ -17,7 +17,9 @@ KIND, either express or implied.  See the License for the
 specific language governing permissions and limitations
 under the License.
 -->
-<assembly>
+<assembly xmlns="http://maven.apache.org/ASSEMBLY/2.2.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.2.0 http://maven.apache.org/xsd/assembly-2.2.0.xsd">
   <id>bin</id>
   <formats>
     <format>tar.gz</format>
diff --git a/src/main/assembly/src.xml b/src/main/assembly/src.xml
index 093e916..0315bac 100644
--- a/src/main/assembly/src.xml
+++ b/src/main/assembly/src.xml
@@ -17,7 +17,9 @@ KIND, either express or implied.  See the License for the
 specific language governing permissions and limitations
 under the License.
 -->
-<assembly>
+<assembly xmlns="http://maven.apache.org/ASSEMBLY/2.2.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.2.0 http://maven.apache.org/xsd/assembly-2.2.0.xsd">
   <id>src</id>
   <formats>
     <format>tar.gz</format>