diff --git a/.github/workflows/demo.yml b/.github/workflows/demo.yml
index 19e7a5fd..4678550e 100644
--- a/.github/workflows/demo.yml
+++ b/.github/workflows/demo.yml
@@ -6,7 +6,7 @@ jobs:
   test-image:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - uses: ./
         with:
           image: "alpine:latest"
@@ -16,7 +16,7 @@ jobs:
   test-directory:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - uses: ./
         with:
           path: "tests/fixtures/npm-project"
@@ -27,7 +27,7 @@ jobs:
   sbom:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - uses: ./
         with:
           sbom: tests/fixtures/test_sbom.spdx.json
diff --git a/.github/workflows/release-drafter.yml b/.github/workflows/release-drafter.yml
index ae28a3d1..d2111b26 100644
--- a/.github/workflows/release-drafter.yml
+++ b/.github/workflows/release-drafter.yml
@@ -10,6 +10,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Draft release notes
-        uses: release-drafter/release-drafter@v5
+        uses: release-drafter/release-drafter@09c613e259eb8d4e7c81c2cb00618eb5fc4575a7 # v5.25.0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/sarifdemo.yml b/.github/workflows/sarifdemo.yml
index bc36a8b4..43d464d2 100644
--- a/.github/workflows/sarifdemo.yml
+++ b/.github/workflows/sarifdemo.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the code
-        uses: actions/checkout@v2
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
       - name: Run the local Scan Action with SARIF generation enabled
         id: scan
@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the code
-        uses: actions/checkout@v2
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
       - name: Run the local Scan Action with SARIF generation enabled
         id: scan
diff --git a/.github/workflows/tag-release.yml b/.github/workflows/tag-release.yml
index 063e4664..c9e01c4a 100644
--- a/.github/workflows/tag-release.yml
+++ b/.github/workflows/tag-release.yml
@@ -8,6 +8,6 @@ jobs:
   actions-tagger:
     runs-on: ubuntu-latest
     steps:
-      - uses: Actions-R-Us/actions-tagger@v2
+      - uses: Actions-R-Us/actions-tagger@330ddfac760021349fef7ff62b372f2f691c20fb # v2.0.3
         with:
           publish_latest_tag: true
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3514c181..37324933 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
   build: # make sure build/ci work properly and there is no faked build ncc built scripts
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - run: npm ci
       - run: npm run audit
       - run: npm run build
@@ -27,7 +27,7 @@ jobs:
         ports:
           - 5000:5000
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - name: Build images
         run: |
           for distro in alpine centos debian; do
diff --git a/.github/workflows/update-grype-release.yml b/.github/workflows/update-grype-release.yml
index 969176d5..0bfa4b9d 100644
--- a/.github/workflows/update-grype-release.yml
+++ b/.github/workflows/update-grype-release.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository == 'anchore/scan-action'
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - name: Get latest Grype version
         id: latest-version
         env:
@@ -25,12 +25,12 @@ jobs:
           npm run build
           # export the version for use with create-pull-request:
           echo "LATEST_VERSION=$LATEST_VERSION" >> $GITHUB_OUTPUT
-      - uses: tibdex/github-app-token@v1
+      - uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a # v2.1.0
         id: generate-token
         with:
           app_id: ${{ secrets.TOKEN_APP_ID }}
           private_key: ${{ secrets.TOKEN_APP_PRIVATE_KEY }}
-      - uses: peter-evans/create-pull-request@v4
+      - uses: peter-evans/create-pull-request@153407881ec5c347639a548ade7d8ad1d6740e38 # v5.0.2
         with:
           signoff: true
           delete-branch: true
diff --git a/README.md b/README.md
index 61577c69..bd16308f 100644
--- a/README.md
+++ b/README.md
@@ -150,7 +150,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - name: Build the container image
         run: docker build . --file Dockerfile --tag localbuild/testimage:latest
       - uses: anchore/scan-action@v3
@@ -170,7 +170,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - name: Build the Container image
         run: docker build . --file Dockerfile --tag localbuild/testimage:latest
       - uses: anchore/scan-action@v3