fix copy paste error
diff --git a/pom.xml b/pom.xml
index 6229eb8..069f16f 100755
--- a/pom.xml
+++ b/pom.xml
@@ -353,7 +353,7 @@
                             <goal>jar</goal>
                         </goals>
                         <configuration>
-                            <source>1.8</source>
+                            <source>1.6</source>
                             <failOnError>false</failOnError>
                         </configuration>
                     </execution>