diff --git a/.github/workflows/auto-tag.yml b/.github/workflows/auto-tag.yml
index 1c6e3fd..35f5ec4 100644
--- a/.github/workflows/auto-tag.yml
+++ b/.github/workflows/auto-tag.yml
@@ -1,16 +1,9 @@
 name: auto-tag
 
 on:
-  workflow_dispatch:
-    inputs:
-      release_body:
-        description: "Release note"
-        type: string
-        required: false
-      ref:
-        description: "Commit to build (git checkout)"
-        type: string
-        required: false
+  pull_request:
+    branches:
+      - "dev"
 
 jobs:
   auto-tag: