diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 11c467e..2d40576 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -8,7 +8,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
         deno: [1.x, "1.21.x", canary]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: denoland/setup-deno@v1
         with:
           deno-version: ${{ matrix.deno }}
diff --git a/.github/workflows/pr.yaml b/.github/workflows/constant-check.yaml
similarity index 68%
rename from .github/workflows/pr.yaml
rename to .github/workflows/constant-check.yaml
index 68b1c5b..36ded52 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/constant-check.yaml
@@ -1,10 +1,15 @@
-name: Pull request check
-on: [pull_request]
+name: constant check
+on:
+  pull_request:
+    branches:
+      - main
+  schedule:
+    - cron: "0 0 * * *"
 jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: denoland/setup-deno@v1
         with:
           deno-version: 1.x