diff --git a/pom.xml b/pom.xml
index a3771a2d0..961fe9d29 100755
--- a/pom.xml
+++ b/pom.xml
@@ -274,7 +274,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-enforcer-plugin</artifactId>
-        <version>1.0.1</version>
+        <version>1.3.1</version>
         <executions>
           <execution>
             <id>enforce-versions</id>
@@ -286,10 +286,21 @@
                 <requireJavaVersion>
                   <version>1.5</version>
                 </requireJavaVersion>
+                <enforceBytecodeVersion>
+                  <maxJdkVersion>1.5</maxJdkVersion>
+                </enforceBytecodeVersion>
               </rules>
             </configuration>
           </execution>
         </executions>
+        <dependencies>
+          <dependency>
+            <groupId>org.codehaus.mojo</groupId>
+            <artifactId>extra-enforcer-rules</artifactId>
+            <version>1.0-beta-2</version>
+            <scope>compile</scope>
+          </dependency>
+        </dependencies>
       </plugin>
 
       <!-- Generate the ANTLRv2 grammar -->