docs: note that the version number must not be omitted

diff --git a/README.md b/README.md
index 0193865efe77501010c6145cc18108152d64f5ef..b68bb0308892582203ab59abdb9c1510fd73f338 100644 (file)
--- a/README.md
+++ b/README.md
@@ -15,3 +15,5 @@ Or, if you need to support IE11, you can create a Vue 2 project with:
 ```sh
 npm init vue@2
 ```
+
+Note that the version number (`@3` or `@2`) MUST NOT be omitted, otherwise `npm` may resolve to a cached and outdated version of the package.