diff --git a/src/assembly/sources.xml b/src/assembly/sources.xml
index 5457e253..4622dbce 100644
--- a/src/assembly/sources.xml
+++ b/src/assembly/sources.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2" 
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-          xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
+          xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.3.xsd">
 
   <id>sources</id>