diff --git a/README.md b/README.md
index 354ac31e..92bbd682 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ To get the software follow these steps:
 
 `cd CubeSatSim`
 
-`git checkout beta-v1.3.1`
+`git checkout beta-v1.3.1.1`
 
 You are now ready to install the software using this script in the CubeSatSim directory: