diff --git a/lib/Release/Bundler/PharBundler.php b/lib/Release/Bundler/PharBundler.php
index 08b30a2..bc5d2eb 100644
--- a/lib/Release/Bundler/PharBundler.php
+++ b/lib/Release/Bundler/PharBundler.php
@@ -48,5 +48,6 @@ public function bundle($outputFile)
         $phar->stopBuffering();
 
         \chdir($workingDir);
+        return is_file($outputFile);
     }
 }