diff --git a/.github/workflows/check-untagged-deps.yml b/.github/workflows/check-untagged-deps.yml
index 3243e87..610afa7 100644
--- a/.github/workflows/check-untagged-deps.yml
+++ b/.github/workflows/check-untagged-deps.yml
@@ -13,7 +13,7 @@ jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 9fa7f7d..9c4de88 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.
@@ -29,14 +29,14 @@ jobs:
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v4
+      uses: github/codeql-action/init@5d4e8d1aca955e8d8589aabd499c5cae939e33c7 # v4.31.9
       with:
         languages: go
 
     # 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@v4
+      uses: github/codeql-action/autobuild@5d4e8d1aca955e8d8589aabd499c5cae939e33c7 # v4.31.9
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -50,4 +50,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v4
+      uses: github/codeql-action/analyze@5d4e8d1aca955e8d8589aabd499c5cae939e33c7 # v4.31.9
diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 757bf3f..228a95b 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -22,13 +22,13 @@ jobs:
     name: "Build ${{ matrix.go-version }} test on ${{ matrix.platform }}"
     steps:
       - name: Set up Go 1.x
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
         with:
           go-version: ${{ matrix.go-version }}
         id: go
 
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v6
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/golangci-lint.yml b/.github/workflows/golangci-lint.yml
index 052b519..6d823ba 100644
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@@ -13,7 +13,7 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           persist-credentials: false
       - name: golangci-lint
diff --git a/.github/workflows/precious.yml b/.github/workflows/precious.yml
index 1cffe14..8fcb157 100644
--- a/.github/workflows/precious.yml
+++ b/.github/workflows/precious.yml
@@ -9,7 +9,7 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           persist-credentials: false
       - name: Install precious
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
index fbef643..04c5c7d 100644
--- a/.github/workflows/zizmor.yml
+++ b/.github/workflows/zizmor.yml
@@ -15,7 +15,7 @@ jobs:
       security-events: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           persist-credentials: false