diff --git a/pom.xml b/pom.xml
index 208dc11..da4debe 100644
--- a/pom.xml
+++ b/pom.xml
@@ -48,7 +48,7 @@
         <maven.release.version>3.1.1</maven.release.version>
         <maven.versions.version>2.20.1</maven.versions.version>
         <maven.surefire.version>3.5.4</maven.surefire.version>
-        <maven.source.version>3.3.1</maven.source.version>
+        <maven.source.version>3.4.0</maven.source.version>
     </properties>
     <dependencies>
         <dependency>