diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 015d703c2..27aae98cb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,24 +6,24 @@ on:
     branches: [master]
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-stepsecurity-x64
     strategy:
       matrix:
         node-version: [24, 22, 20, 18, 16, 14, 12, 10, 8]
     name: Run tests on Node.js ${{ matrix.node-version }}
     steps:
     - name: Setup Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
       with:
         node-version: ${{ matrix.node-version }}
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
     - name: Install dependencies
       run: npm install --legacy-peer-deps
     - name: Run tests
       run: npm test
     - if: matrix.node-version == 24
       name: Send coverage info to Codecov
-      uses: codecov/codecov-action@v5
+      uses: codecov/codecov-action@0fb7174895f61a3b6b78fc075e0cd60383518dac # v5.5.5
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index e89a9b51e..2347d25a3 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -23,7 +23,7 @@ on:
 jobs:
   analyze:
     name: Analyze
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-stepsecurity-x64
     permissions:
       actions: read
       contents: read
@@ -38,11 +38,11 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v3
+      uses: github/codeql-action/init@faaca9a8f6edddba5725ffe5adefdab6669a2eca # v3.38.0
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -53,7 +53,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v3
+      uses: github/codeql-action/autobuild@faaca9a8f6edddba5725ffe5adefdab6669a2eca # v3.38.0
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -67,4 +67,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v3
+      uses: github/codeql-action/analyze@faaca9a8f6edddba5725ffe5adefdab6669a2eca # v3.38.0
diff --git a/.github/workflows/npm-publish.yml b/.github/workflows/npm-publish.yml
index c159e11eb..db1719784 100644
--- a/.github/workflows/npm-publish.yml
+++ b/.github/workflows/npm-publish.yml
@@ -4,18 +4,18 @@ on:
     types: [created]
 jobs:
   publish:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-stepsecurity-x64
     permissions:
       contents: read
       id-token: write
     steps:
     - name: Setup Node.js 24
-      uses: actions/setup-node@v5
+      uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5.0.0
       with:
         node-version: 24
         registry-url: https://registry.npmjs.org/
     - name: Checkout Repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
     - name: Install Dependencies
       run: npm install --legacy-peer-deps
     - name: Run Tests