diff --git a/.github/workflows/after_commit.yml b/.github/workflows/after_commit.yml
index 8d7373e..0898a90 100644
--- a/.github/workflows/after_commit.yml
+++ b/.github/workflows/after_commit.yml
@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Post text to a Slack channel
-        uses: slackapi/slack-github-action@91efab103c0de0a537f72a35f6b8cda0ee76bf0a # v2.1.1
+        uses: slackapi/slack-github-action@af78098f536edbc4de71162a307590698245be95 # v3.0.1
         with:
           method: chat.postMessage
           token: ${{ secrets.SLACK_OAUTH_TOKEN }}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e11d2b4..955ff1c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -40,7 +40,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Post text to a Slack channel
-        uses: slackapi/slack-github-action@91efab103c0de0a537f72a35f6b8cda0ee76bf0a # v2.1.1
+        uses: slackapi/slack-github-action@af78098f536edbc4de71162a307590698245be95 # v3.0.1
         with:
           method: chat.postMessage
           token: ${{ secrets.SLACK_OAUTH_TOKEN }}
diff --git a/.github/workflows/pr_create.yml b/.github/workflows/pr_create.yml
index c4175b5..55c4bbc 100644
--- a/.github/workflows/pr_create.yml
+++ b/.github/workflows/pr_create.yml
@@ -39,7 +39,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Post text to a Slack channel
-        uses: slackapi/slack-github-action@91efab103c0de0a537f72a35f6b8cda0ee76bf0a # v2.1.1
+        uses: slackapi/slack-github-action@af78098f536edbc4de71162a307590698245be95 # v3.0.1
         with:
           method: chat.postMessage
           token: ${{ secrets.SLACK_OAUTH_TOKEN }}