diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 92ccaae..1474ee5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,8 +10,8 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
-    - uses: actions/setup-node@v4
+    - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+    - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
       with:
         node-version: 20
         cache: 'npm'
@@ -22,7 +22,7 @@ jobs:
   self-test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
     - uses: ./
       id: filter
       with:
diff --git a/.github/workflows/pull-request-verification.yml b/.github/workflows/pull-request-verification.yml
index fea75cc..efdde40 100644
--- a/.github/workflows/pull-request-verification.yml
+++ b/.github/workflows/pull-request-verification.yml
@@ -10,8 +10,8 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
-    - uses: actions/setup-node@v4
+    - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+    - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
       with:
         node-version: 20
         cache: 'npm'
@@ -24,7 +24,7 @@ jobs:
     permissions:
       pull-requests: read
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
     - uses: ./
       id: filter
       with:
@@ -45,7 +45,7 @@ jobs:
     permissions:
       pull-requests: read
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
     - uses: ./
       id: filter
       with:
@@ -57,7 +57,7 @@ jobs:
   test-without-token:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
     - uses: ./
       id: filter
       with:
@@ -70,7 +70,7 @@ jobs:
   test-wd-without-token:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
       with:
         path: somewhere
     - uses: ./somewhere
@@ -86,7 +86,7 @@ jobs:
   test-local-changes:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
     - run: echo "NEW FILE" > local
     - run: git add local
     - uses: ./
@@ -106,7 +106,7 @@ jobs:
   test-change-type:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
     - name: configure GIT user
       run: git config user.email "john@nowhere.local" && git config user.name "John Doe"
     - name: modify working tree