diff --git a/README.md b/README.md
index fd939f8..58f6078 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ this tool from working.
 
 To install the tool, run the following command:
 
-    sudo wget http://goo.gl/1BOfJ -O /usr/bin/rpi-update && chmod +x /usr/bin/rpi-update
+    sudo wget http://goo.gl/1BOfJ -O /usr/bin/rpi-update && sudo chmod +x /usr/bin/rpi-update
 
 ## Updating