diff --git a/README.md b/README.md
index 20a4253..64d2254 100644
--- a/README.md
+++ b/README.md
@@ -80,7 +80,7 @@ jobs:
   build-deploy:
     runs-on: ubuntu-18.04
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v1  # v2 does not have submodules option now
         # with:
         #   submodules: true