diff --git a/pom.xml b/pom.xml
index 50c0ce6..0e84e67 100644
--- a/pom.xml
+++ b/pom.xml
@@ -166,6 +166,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
+                <version>3.1.0</version>
                 <executions>
                     <execution>
                         <id>attach-sources</id>