diff --git a/lib/ansible/modules/extras/packaging/language/composer.py b/lib/ansible/modules/extras/packaging/language/composer.py
index f788f53dd5c..23d9dc5031e 100644
--- a/lib/ansible/modules/extras/packaging/language/composer.py
+++ b/lib/ansible/modules/extras/packaging/language/composer.py
@@ -159,7 +159,8 @@ def main():
         output = parse_out(err)
         module.fail_json(msg=output)
     else:
-        output = parse_out(out)
+        # Composer version > 1.0.0-alpha9 now use stderr for standard notification messages
+        output = parse_out(out + err)
         module.exit_json(changed=has_changed(output), msg=output)
 
 # import module snippets