diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3905c37..40d7d23 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@fa2e9d605c4eeb9fcad4c99c224cee0c6c7f3594 # v2.16.0
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0
       - name: Build
         run: cargo build --verbose
       - name: Run unit tests
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index db73881..b6765da 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,13 +10,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@fa2e9d605c4eeb9fcad4c99c224cee0c6c7f3594 # v2.16.0
+        with:
+          egress-policy: audit
+
       - name: Get the version
         id: get_version
         run: echo ::set-output name=VERSION::${GITHUB_REF#refs/tags/}
 
-      - uses: actions/checkout@master
+      - uses: actions/checkout@61b9e3751b92087fd0b06925ba6dd6314e06f089 # master
 
-      - uses: hecrj/setup-rust-action@master
+      - uses: hecrj/setup-rust-action@110f36749599534ca96628b82f52ae67e5d95a3c # master
         with:
           rust-version: stable
 
@@ -42,7 +47,7 @@ jobs:
 
       - name: Create release
         id: create_release
-        uses: actions/create-release@v1
+        uses: actions/create-release@0cb9c9b65d5d1901c1f53e5e66eaf4afd303e70e # v1.1.4
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
@@ -53,7 +58,7 @@ jobs:
 
       - name: Upload Debian package
         id: upload-release-asset-debian
-        uses: actions/upload-release-asset@v1
+        uses: actions/upload-release-asset@e8f9f06c4b078e705bd2ea027f0926603fc9b4d5 # v1.0.2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
@@ -64,7 +69,7 @@ jobs:
 
       - name: Upload tarball
         id: upload-release-asset-tarball
-        uses: actions/upload-release-asset@v1
+        uses: actions/upload-release-asset@e8f9f06c4b078e705bd2ea027f0926603fc9b4d5 # v1.0.2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with: