diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d343495f..c4317e73 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
         run: echo "RUNNING=1" >> $GITHUB_ENV
       - uses: actions/checkout@v3
       - uses: technote-space/get-git-comment-action@v1
-      - uses: technote-space/get-diff-action@gh-actions
+      - uses: technote-space/get-diff-action@v6
         with:
           PATTERNS: +(src|__tests__)/**/*.+(js|ts)
           FILES: |
@@ -56,7 +56,7 @@ jobs:
         run: echo "RUNNING=1" >> $GITHUB_ENV
       - uses: actions/checkout@v3
       - uses: technote-space/get-git-comment-action@v1
-      - uses: technote-space/get-diff-action@gh-actions
+      - uses: technote-space/get-diff-action@v6
         with:
           PATTERNS: +(src|__tests__)/**/*.+(js|ts|snap)
           FILES: |
diff --git a/README.md b/README.md
index d1ab583b..c65eb207 100644
--- a/README.md
+++ b/README.md
@@ -218,7 +218,8 @@ If there is no difference in the source code below, this workflow will skip the
 | eventName | action |
 |:---|:---|
 | pull_request | opened, reopened, synchronize, closed, ready_for_review |
-| push | * |
+| push         | * |
+| merge_group  | * |
 
 If called on any other event, the result will be empty.
 
diff --git a/src/constant.ts b/src/constant.ts
index 123d1603..b8c52787 100644
--- a/src/constant.ts
+++ b/src/constant.ts
@@ -7,5 +7,6 @@ export const TARGET_EVENTS = {
     'ready_for_review',
   ],
   'push': '*',
+  'merge_group': '*',
 };
 export const REMOTE_NAME   = 'get-diff-action';
diff --git a/src/utils/misc.ts b/src/utils/misc.ts
index 086e32f9..445108f9 100644
--- a/src/utils/misc.ts
+++ b/src/utils/misc.ts
@@ -75,5 +75,12 @@ export const getDiffInfo = async(octokit: Octokit, context: Context): Promise<Di
     }, context);
   }
 
+  if (context.payload.merge_group) {
+    return {
+      base: context.payload.merge_group.base_sha,
+      head: context.payload.merge_group.head_sha,
+    };
+  }
+
   return getDiffInfoForPush(octokit, context);
 };