diff --git a/Release-Procedure.md b/Release-Procedure.md
index c2f9966..f4e3c74 100644
--- a/Release-Procedure.md
+++ b/Release-Procedure.md
@@ -109,7 +109,7 @@ Edit the `package.json` page to include the version number for the latest releas
     npm install
 
     # commit the change
-    git add package.json
+    git add package.json package-lock.json
     git commit -m 'Updating for v3.1.0'
 
     # push to GitHub