diff --git a/.github/workflows/commit-check.yml b/.github/workflows/commit-check.yml
index b22e048..5c9a243 100644
--- a/.github/workflows/commit-check.yml
+++ b/.github/workflows/commit-check.yml
@@ -1,7 +1,7 @@
 name: Commit Check
 
 on:
-  pull_request:
+  pull_request_target:
     branches: 'main'
   workflow_dispatch:
 
@@ -11,14 +11,17 @@ jobs:
     permissions:  # use permissions because of use pr-comments
       contents: read
       pull-requests: write
+      issues: write
     steps:
       - uses: actions/checkout@v5
         with:
-          ref: ${{ github.event.pull_request.head.sha }}  # checkout PR HEAD commit
+          ref: ${{ format('refs/pull/{0}/head', github.event.pull_request.number) }}  # checkout PR HEAD commit
           fetch-depth: 0  # fetch all history for all branches and tags
+          persist-credentials: false
       - uses: ./ # self test
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # use GITHUB_TOKEN because of use pr-comments
+          GITHUB_PR_NUMBER: ${{ github.event.pull_request.number }} # pass PR number for pull_request_target events
         with:
           message: true
           branch: true
@@ -28,4 +31,4 @@ jobs:
           merge-base: true
           imperative: true
           job-summary: true
-          pr-comments: ${{ github.event_name == 'pull_request' }}
+          pr-comments: ${{ github.event_name == 'pull_request' || github.event_name == 'pull_request_target' }}
diff --git a/.gitignore b/.gitignore
index 43f4b6f..2233054 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 venv/
 .venv/
+__pycache__/
diff --git a/README.md b/README.md
index 478a8d4..2c3f9fd 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ name: Commit Check
 
 on:
   push:
-  pull_request:
+  pull_request_target:
     branches: 'main'
 
 jobs:
@@ -36,11 +36,13 @@ jobs:
     permissions:  # use permissions because use of pr-comments
       contents: read
       pull-requests: write
+      issues: write
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha }}  # checkout PR HEAD commit
+          ref: ${{ format('refs/pull/{0}/head', github.event.pull_request.number) }}  # checkout PR HEAD commit
           fetch-depth: 0  # required for merge-base check
+          persist-credentials: false
       - uses: commit-check/commit-check-action@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # use GITHUB_TOKEN because use of pr-comments
@@ -53,7 +55,7 @@ jobs:
           merge-base: false
           imperative: false
           job-summary: true
-          pr-comments: ${{ github.event_name == 'pull_request' }}
+          pr-comments: ${{ github.event_name == 'pull_request' || github.event_name == 'pull_request_target' }}
 ```
 
 ## Used By
@@ -136,9 +138,7 @@ jobs:
 - Default: `false`
 
 > [!IMPORTANT]
-> `pr-comments` is an experimental feature. By default, it's disabled. To use it, you need to set `GITHUB_TOKEN` in the GitHub Action.
->
-> This feature currently doesn’t work with forked repositories. For more details, refer to issue [#77](https://github.com/commit-check/commit-check-action/issues/77).
+> `pr-comments` is an experimental feature. By default, it's disabled. To use it, you need to set `GITHUB_TOKEN` in the GitHub Action and ensure your workflow has `issues: write` permission.
 
 Note: the default rule of above inputs is following [this configuration](https://github.com/commit-check/commit-check/blob/main/.commit-check.yml). If you want to customize, just add your `.commit-check.yml` config file under your repository root directory.
 
diff --git a/main.py b/main.py
index ef9c920..3bf39f5 100755
--- a/main.py
+++ b/main.py
@@ -25,6 +25,7 @@
 GITHUB_TOKEN = os.getenv("GITHUB_TOKEN")
 GITHUB_REPOSITORY = os.getenv("GITHUB_REPOSITORY")
 GITHUB_REF = os.getenv("GITHUB_REF")
+GITHUB_PR_NUMBER = os.getenv("GITHUB_PR_NUMBER")
 
 
 def log_env_vars():
@@ -116,12 +117,19 @@ def add_pr_comments() -> int:
     try:
         token = os.getenv("GITHUB_TOKEN")
         repo_name = os.getenv("GITHUB_REPOSITORY")
-        pr_number = os.getenv("GITHUB_REF")
-        if pr_number is not None:
-            pr_number = pr_number.split("/")[-2]
-        else:
-            # Handle the case where GITHUB_REF is not set
-            raise ValueError("GITHUB_REF environment variable is not set")
+
+        # Get PR number from GITHUB_PR_NUMBER (for pull_request_target) or extract from GITHUB_REF (for pull_request)
+        pr_number = os.getenv("GITHUB_PR_NUMBER")
+        if pr_number is None:
+            # Fallback to extracting from GITHUB_REF for backward compatibility
+            github_ref = os.getenv("GITHUB_REF")
+            if github_ref is not None:
+                pr_number = github_ref.split("/")[-2]
+            else:
+                # Handle the case where neither environment variable is set
+                raise ValueError(
+                    "Neither GITHUB_PR_NUMBER nor GITHUB_REF environment variable is set"
+                )
 
         # Initialize GitHub client
         g = Github(token)