diff --git a/pom.xml b/pom.xml
index df51715..090f1d8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -189,6 +189,7 @@
                         <version>2.9.1</version>
                         <configuration>
                             <additionalparam>-Xdoclint:none</additionalparam>
+                            <source>1.8</source>
                         </configuration>
                         <executions>
                             <execution>