diff --git a/install.sh b/install.sh
index 5707db7..e791b6a 100644
--- a/install.sh
+++ b/install.sh
@@ -6,3 +6,4 @@ sudo cp -r functions /opt/postinstall
 chmod a+x uninstall.sh
 sudo chmod a+x /opt/postinstall/main.py
 sudo chmod a+x /opt/postinstall/functions/*
+sudo chmod a+x /usr/bin/postinstall