diff --git a/pom.xml b/pom.xml
index 103ee0b..657ad0a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -88,7 +88,7 @@
         <buildnumber.plugin.version>3.2.1</buildnumber.plugin.version>
         <compiler.plugin.version>3.14.1</compiler.plugin.version>
         <enforcer.plugin.version>3.6.2</enforcer.plugin.version>
-        <source.plugin.version>3.3.1</source.plugin.version>
+        <source.plugin.version>3.4.0</source.plugin.version>
         <jar.plugin.version>3.5.0</jar.plugin.version>
         <surefire.plugin.version>2.22.2</surefire.plugin.version>
         <exec.plugin.version>3.6.2</exec.plugin.version>