diff --git a/pom.xml b/pom.xml
index cf647db63604aaa82866c36bd507d60f0807ef5d..91d4ebc38d54cd0f4e49c864d13acb15d5909121 100644
--- a/pom.xml
+++ b/pom.xml
@@ -229,6 +229,7 @@
                         <sourcepath>src/main/java/</sourcepath>
                         <show>public</show>
                         <failOnError>true</failOnError>
+                        <source>8</source>
                     </configuration>
                     <executions>
                         <execution>