diff --git a/README.md b/README.md
index e827789..a979c38 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
 
     - name: Cache Primes
       id: cache-primes