diff --git a/.github/workflows/depup.yml b/.github/workflows/depup.yml
index ef30690..4615c81 100644
--- a/.github/workflows/depup.yml
+++ b/.github/workflows/depup.yml
@@ -15,7 +15,7 @@ jobs:
   shellcheck:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - uses: reviewdog/action-depup@v1
         id: depup
         with:
@@ -41,7 +41,7 @@ jobs:
   reviewdog:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - uses: reviewdog/action-depup@v1
         id: depup
         with:
@@ -67,7 +67,7 @@ jobs:
   actionlint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - uses: reviewdog/action-depup@v1
         id: depup
         with:
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 331877f..582bdab 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -9,6 +9,6 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Build the Docker image
         run: docker build . --file Dockerfile --tag "reviewdog-actionlint:$(date +%s)"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9688cc4..506c7d7 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -19,7 +19,7 @@ jobs:
       issues: write
       packages: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           fetch-depth: 0
 
@@ -64,7 +64,7 @@ jobs:
       pull-requests: write
       issues: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/reviewdog.yml b/.github/workflows/reviewdog.yml
index e38223c..6d07dfa 100644
--- a/.github/workflows/reviewdog.yml
+++ b/.github/workflows/reviewdog.yml
@@ -13,7 +13,7 @@ jobs:
     name: runner / actionlint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: actionlint
         uses: ./
         with:
@@ -23,7 +23,7 @@ jobs:
     name: runner / reviewdog
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: actionlint w/ reviewdog
         uses: ./
         with:
@@ -34,7 +34,7 @@ jobs:
     name: runner / shellcheck
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: actionlint w/ shellcheck
         uses: ./
         with:
@@ -45,7 +45,7 @@ jobs:
     name: runner / pyflakes
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: actionlint w/ pyflakes
         uses: ./
         with:
diff --git a/Dockerfile b/Dockerfile
index 2e49a04..52e8f87 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,7 +23,7 @@ RUN apk --update add git curl && \
   rm /var/cache/apk/*
 
 # install reviewdog
-ENV REVIEWDOG_VERSION=v0.14.2
+ENV REVIEWDOG_VERSION=v0.15.0
 RUN wget -O - -q https://raw.githubusercontent.com/reviewdog/reviewdog/master/install.sh | sh -s -- -b /usr/local/bin/ ${REVIEWDOG_VERSION}
 
 # install actionlint
diff --git a/README.md b/README.md
index 1e3d90e..8a4f1e7 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ jobs:
   actionlint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: reviewdog/action-actionlint@v1
 ```