diff --git a/.github/workflows/build-docs.yml b/.github/workflows/build-docs.yml
index b7e3b5bb..7c3a7600 100644
--- a/.github/workflows/build-docs.yml
+++ b/.github/workflows/build-docs.yml
@@ -17,10 +17,10 @@ jobs:
       id-token: write
       pages: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install uv
-        uses: astral-sh/setup-uv@v6
+        uses: astral-sh/setup-uv@d0cc045d04ccac9d8b7881df0226f9e82c39688e # v6.8.0
         with:
           python-version: "3.10"
 
@@ -33,14 +33,14 @@ jobs:
         working-directory: ./doc
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: html-docs
           path: ./doc/html/
 
       - name: Deploy Master Docs to GitHub Pages
         if: ${{ github.ref == 'refs/heads/master' }}
-        uses: peaceiris/actions-gh-pages@v4
+        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e # v4.0.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./doc/html
diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index cc341ca3..e163ac54 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -27,10 +27,10 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
     - name: Install uv
-      uses: astral-sh/setup-uv@v6
+      uses: astral-sh/setup-uv@d0cc045d04ccac9d8b7881df0226f9e82c39688e # v6.8.0
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -54,7 +54,7 @@ jobs:
 
     steps:
     - name: Harden Runner
-      uses: step-security/harden-runner@v2.13.0
+      uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
       with:
         egress-policy: audit
         allowed-endpoints: >
@@ -78,10 +78,10 @@ jobs:
           updates.jenkins.io:80
 
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
     - name: Install uv
-      uses: astral-sh/setup-uv@v6
+      uses: astral-sh/setup-uv@d0cc045d04ccac9d8b7881df0226f9e82c39688e # v6.8.0
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -89,7 +89,7 @@ jobs:
       run: uv python install
 
     - name: setup java 21
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v5.0.0
       with:
         java-version: '21'
         distribution: 'temurin'
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1b76ffec..df8b08fa 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,10 +12,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install uv
-        uses: astral-sh/setup-uv@v6
+        uses: astral-sh/setup-uv@d0cc045d04ccac9d8b7881df0226f9e82c39688e # v6.8.0
         with:
           python-version: "3.13"
 
@@ -30,7 +30,7 @@ jobs:
         run: uv build
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: package
           path: dist/
@@ -48,7 +48,7 @@ jobs:
         url: https://pypi.org/project/jenkinsapi/
     steps:
       - name: Download artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
         with:
           name: package
           path: dist
@@ -57,7 +57,7 @@ jobs:
         run: tree
 
       - name: Publish
-        uses: pypa/gh-action-pypi-publish@release/v1
+        uses: pypa/gh-action-pypi-publish@ed0c53931b1dc9bd32cbe73a98c7f6766f8a527e # v1.13.0
 
   asset:
     needs: [build]
@@ -66,7 +66,7 @@ jobs:
       contents: write
     steps:
       - name: Download artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
         with:
           name: package
           path: dist