diff --git a/INSTALL.md b/INSTALL.md
index 6fe68b70f22c28251c29ace3914fac4040687bb1..2b2e84418a16ddde31ae18a43dcab19613338e6e 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -141,7 +141,7 @@ loaded from the internet.
     care; while you have the port open and the VM running, anyone on the same
     network will be able to see (and possibly plagiarize) your source code.
 
-11. To run the app, open on of the following URLs:
+11. To run the app, open one of the following URLs:
 
     *   <http://localhost/~cse/soft260_project/index.html> (from within your
         VM),