diff --git a/README.md b/README.md
index 42c64a2..e4b4cbe 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ jobs:
 
       - name: Run Codex
         id: run_codex
-        uses: openai/codex-action@main
+        uses: openai/codex-action@v1
         with:
           openai-api-key: ${{ secrets.OPENAI_API_KEY }}
           prompt: |
diff --git a/examples/test-sandbox-protections.yml b/examples/test-sandbox-protections.yml
index cb6b882..8347f26 100644
--- a/examples/test-sandbox-protections.yml
+++ b/examples/test-sandbox-protections.yml
@@ -21,7 +21,7 @@ jobs:
           - unsafe
     steps:
       - name: Run Codex (${{ matrix.safety-strategy }})
-        uses: openai/codex-action@main
+        uses: openai/codex-action@v1
         with:
           # An OpenAI API key often starts with `sk-proj-` and is followed
           # by random characters matching [A-Za-z-0-9_-].
diff --git a/examples/unprivileged-user.yml b/examples/unprivileged-user.yml
index 13a4122..1a386ee 100644
--- a/examples/unprivileged-user.yml
+++ b/examples/unprivileged-user.yml
@@ -31,7 +31,7 @@ jobs:
           sudo find "$GITHUB_WORKSPACE" -type d -exec chmod g+s {} +
 
       - name: Run Codex as unprivileged user
-        uses: openai/codex-action@main
+        uses: openai/codex-action@v1
         with:
           openai-api-key: ${{ secrets.OPENAI_API_KEY }}
           safety-strategy: unprivileged-user