diff --git a/README.md b/README.md
index 1ed2832..6cdfdee 100644
--- a/README.md
+++ b/README.md
@@ -188,7 +188,7 @@ If these solution isn't fix your problem, please create issues [here.](https://g
 
 **App not installed :**
 - Free up some storage space and try again
-- Uninstall official YouTube Vanced client downloaded from Vanced Manager then reinstall. Reason : Mismatch signature.
+- Uninstall official YouTube Vanced client downloaded from Vanced Manager or other unknown sources then try again. Reason : Mismatch signature.
 - Make sure you have downloaded Universal version of YouTube Vanced/YouTube Music Vanced.
 
 **Crash when opening:**