diff --git a/.github/workflows/ai_explain.yaml b/.github/workflows/ai_explain.yaml
index 6c3ae4a5b7..ad4176a89a 100644
--- a/.github/workflows/ai_explain.yaml
+++ b/.github/workflows/ai_explain.yaml
@@ -6,7 +6,7 @@ permissions:
 
 on:
   pull_request:
-    types: [opened, synchronize]
+    types: [review_requested]
 
 jobs:
   explain-pr:
@@ -32,4 +32,4 @@ jobs:
           OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
           GITHUB_REPOSITORY: ${{ github.repository }}
           GITHUB_REF: ${{ github.ref }}
-        run: python .github/workflows/ai_explain.py
\ No newline at end of file
+        run: python .github/workflows/ai_explain.py