diff --git a/Release-Procedure.md b/Release-Procedure.md
index 30bb72b..c693127 100644
--- a/Release-Procedure.md
+++ b/Release-Procedure.md
@@ -34,7 +34,13 @@ E.g. in `package.json`
 }
 ```
 
-    git add package.json
+To pick this change up in `package-lock.json`, run
+
+    npm install
+
+Commit the version changes:
+
+    git add package.json package-lock.json
     git commit -m 'Update package version to 3.1.0'
 
 ### Merge the release branch