diff --git a/client.js b/client.js
index 2de880e..fddd13e 100644
--- a/client.js
+++ b/client.js
@@ -120,7 +120,7 @@
   function getManifestFileDeps () {
     const manifest = (browser || chrome).runtime.getManifest()
     const manifestStr = JSON.stringify(manifest)
-    return manifestStr.match(fileRegex)
+    return manifestStr.match(fileRegex) || []
   }
 
   /**