diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6ff1f205..36826542 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -25,13 +25,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - name: Set up JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           distribution: temurin
           java-version: 21
-      - uses: gradle/actions/setup-gradle@v4
+      - uses: gradle/actions/setup-gradle@94baf225fe0a508e581a564467443d0e2379123b # v4
       - name: API check
         run: ./gradlew ktLintCheck
   api_check:
@@ -39,26 +39,26 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - name: Set up JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           distribution: temurin
           java-version: 21
-      - uses: gradle/actions/setup-gradle@v4
+      - uses: gradle/actions/setup-gradle@94baf225fe0a508e581a564467443d0e2379123b # v4
       - name: API check
         run: ./gradlew apiCheck
   build:
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - name: Set up JDK 21
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           java-version: 21
           distribution: 'temurin'
       - name: Cache Gradle and wrapper
-        uses: actions/cache@v4
+        uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4
         with:
           path: |
             ~/.gradle/caches
diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 5f9ab709..a6928957 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -7,12 +7,12 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
         with:
           submodules: "recursive" 
           fetch-depth: 0       # Fetch all history for .GitInfo and .Lastmod
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5
         with:
           python-version: '3.7'
           architecture: 'x64'
@@ -27,7 +27,7 @@ jobs:
       - name: Build site
         run: mkdocs build
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v4
+        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e # v4
         with:
           personal_token: ${{ secrets.GH_SECRET }}
           publish_dir: ./site
diff --git a/.github/workflows/labeler.yml b/.github/workflows/labeler.yml
index 0127be63..5e01d830 100644
--- a/.github/workflows/labeler.yml
+++ b/.github/workflows/labeler.yml
@@ -9,6 +9,6 @@ jobs:
       pull-requests: write
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/labeler@v5
+    - uses: actions/labeler@8558fd74291d67161a8a78ce36a881fa63b766a9 # v5
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"
diff --git a/.github/workflows/publish-converters.yml b/.github/workflows/publish-converters.yml
index 9c1da841..9357f335 100644
--- a/.github/workflows/publish-converters.yml
+++ b/.github/workflows/publish-converters.yml
@@ -8,15 +8,15 @@ jobs:
     runs-on: macos-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: Install JDK 21
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           distribution: 'temurin'
           java-version: 21
 
-      - uses: gradle/actions/setup-gradle@v4
+      - uses: gradle/actions/setup-gradle@94baf225fe0a508e581a564467443d0e2379123b # v4
 
       - name: Publish release
         run: ./gradlew :ktorfit-converters:call:publishAllPublicationsToMavenCentralRepository :ktorfit-converters:flow:publishAllPublicationsToMavenCentralRepository :ktorfit-converters:response:publishAllPublicationsToMavenCentralRepository
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 013bbfe4..c29e39a1 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -8,15 +8,15 @@ jobs:
     runs-on: macos-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: Install JDK 21
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           distribution: 'temurin'
           java-version: 21
 
-      - uses: gradle/actions/setup-gradle@v4
+      - uses: gradle/actions/setup-gradle@94baf225fe0a508e581a564467443d0e2379123b # v4
 
       - name: Publish release
         run: ./gradlew :ktorfit-annotations:publishAllPublicationsToMavenCentralRepository
@@ -29,15 +29,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: Install JDK 21
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           distribution: 'temurin'
           java-version: 21
 
-      - uses: gradle/actions/setup-gradle@v4
+      - uses: gradle/actions/setup-gradle@94baf225fe0a508e581a564467443d0e2379123b # v4
 
       - name: Publish release
         run: ./gradlew :ktorfit-ksp:publishAllPublicationsToMavenCentralRepository
@@ -50,15 +50,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: Install JDK 21
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           distribution: 'temurin'
           java-version: 21
 
-      - uses: gradle/actions/setup-gradle@v4
+      - uses: gradle/actions/setup-gradle@94baf225fe0a508e581a564467443d0e2379123b # v4
 
       - name: Publish release
         run: ./gradlew :ktorfit-compiler-plugin:publishAllPublicationsToMavenCentralRepository
@@ -71,15 +71,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: Install JDK 21
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           distribution: 'temurin'
           java-version: 21
 
-      - uses: gradle/actions/setup-gradle@v4
+      - uses: gradle/actions/setup-gradle@94baf225fe0a508e581a564467443d0e2379123b # v4
 
       - name: Publish release
         run: ./gradlew :ktorfit-gradle-plugin:publishAllPublicationsToMavenCentralRepository
@@ -92,15 +92,15 @@ jobs:
     runs-on: macos-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: Install JDK 21
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           distribution: 'temurin'
           java-version: 21
 
-      - uses: gradle/actions/setup-gradle@v4
+      - uses: gradle/actions/setup-gradle@94baf225fe0a508e581a564467443d0e2379123b # v4
 
       - name: Publish release
         run: ./gradlew :ktorfit-lib:publishAllPublicationsToMavenCentralRepository :ktorfit-lib-core:publishAllPublicationsToMavenCentralRepository
diff --git a/.github/workflows/update-gradle-wrapper.yml b/.github/workflows/update-gradle-wrapper.yml
index b4770ad1..4f74fe06 100644
--- a/.github/workflows/update-gradle-wrapper.yml
+++ b/.github/workflows/update-gradle-wrapper.yml
@@ -12,11 +12,11 @@ jobs:
 
     steps:
       - name: Install JDK 21
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           distribution: 'temurin'
           java-version: 21
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: Update Gradle Wrapper
-        uses: gradle-update/update-gradle-wrapper-action@v2
\ No newline at end of file
+        uses: gradle-update/update-gradle-wrapper-action@9cca748ef7cfd967bc3a5c39e15a7aa229ad1b3d # v2
\ No newline at end of file