diff --git a/pom.xml b/pom.xml
index 65770f4..17ba194 100644
--- a/pom.xml
+++ b/pom.xml
@@ -25,7 +25,7 @@
         <approvaltests.version>18.7.1</approvaltests.version>
         <!-- plugins -->
         <maven-compiler-plugin.version>3.12.1</maven-compiler-plugin.version>
-        <maven-source-plugin.version>3.3.0</maven-source-plugin.version>
+        <maven-source-plugin.version>3.3.1</maven-source-plugin.version>
         <maven-javadoc-plugin.version>3.6.3</maven-javadoc-plugin.version>
         <maven-release-plugin.version>3.0.1</maven-release-plugin.version>
         <maven-gpg-plugin.version>3.1.0</maven-gpg-plugin.version>