diff --git a/function-maven-plugin/pom.xml b/function-maven-plugin/pom.xml
index c78f0265..a48f544c 100644
--- a/function-maven-plugin/pom.xml
+++ b/function-maven-plugin/pom.xml
@@ -119,7 +119,7 @@
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-source-plugin</artifactId>
-            <version>3.3.1</version>
+            <version>3.2.1</version>
             <executions>
               <execution>
                 <id>attach-sources</id>
diff --git a/functions-framework-api/pom.xml b/functions-framework-api/pom.xml
index 2b937978..51d6a67a 100644
--- a/functions-framework-api/pom.xml
+++ b/functions-framework-api/pom.xml
@@ -151,7 +151,7 @@
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-source-plugin</artifactId>
-            <version>3.3.1</version>
+            <version>3.2.1</version>
             <executions>
               <execution>
                 <id>attach-sources</id>
diff --git a/invoker/pom.xml b/invoker/pom.xml
index 8d3182ae..28992926 100644
--- a/invoker/pom.xml
+++ b/invoker/pom.xml
@@ -67,7 +67,7 @@
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-source-plugin</artifactId>
-            <version>3.3.1</version>
+            <version>3.2.1</version>
             <executions>
               <execution>
                 <id>attach-sources</id>
@@ -119,4 +119,4 @@
       </build>
     </profile>
   </profiles>
-</project>
\ No newline at end of file
+</project>