1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index b011c05..76c4d77 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,7 @@ Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous
 ```yaml
 - uses: actions/checkout@v2-beta
   with:
-    ref: ${{ github.event.after }}
+    ref: ${{ github.event.pull_request.head.sha }}
 ```
 
 # License