diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 168b04d..56be600 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -21,11 +21,3 @@ jobs:
       - uses: crate-ci/typos@master
         with:
           files: ./README.md
-  pr-title:
-    name: Check PR title
-    runs-on: ubuntu-latest
-    steps:
-      - uses: Slashgear/action-check-pr-title@v4.3.0
-        with:
-          regexp: "(Add|Update|Remove) .+"
-          helpMessage: "Example: 'Add MO2'"
diff --git a/.github/workflows/pr-title.yaml b/.github/workflows/pr-title.yaml
new file mode 100644
index 0000000..bb1d08a
--- /dev/null
+++ b/.github/workflows/pr-title.yaml
@@ -0,0 +1,14 @@
+on:
+  pull_request:
+    types: [opened, edited, synchronize]
+    paths: [README.md]
+
+jobs:
+  pr-title:
+    name: Check PR title
+    runs-on: ubuntu-latest
+    steps:
+      - uses: Slashgear/action-check-pr-title@v4.3.0
+        with:
+          regexp: "(Add|Update|Remove) .+"
+          helpMessage: "Example: 'Add MO2'"