diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..2c48305
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    groups:
+      github-actions:
+        patterns: ["*"]
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 7
diff --git a/.github/workflows/c.yml b/.github/workflows/c.yml
index ccaa645..e36e6b8 100644
--- a/.github/workflows/c.yml
+++ b/.github/workflows/c.yml
@@ -24,7 +24,7 @@ jobs:
         opt_level: ['GENERIC', 'FAST']
         targetPlatform: [x86, x64]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@0717577d45739eb3c851188b29f50ed6c0b2194e # v2.8.0
     - name: Build
       env: 
         OPT_LEVEL: ${{ matrix.opt_level }}
@@ -62,7 +62,7 @@ jobs:
         opt_level: ['GENERIC', 'FAST']
         sanitizer: ['address', 'undefined']
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@0717577d45739eb3c851188b29f50ed6c0b2194e # v2.8.0
     - name: Build
       env:
         OPT_LEVEL: ${{ matrix.opt_level }}
@@ -82,7 +82,7 @@ jobs:
       matrix:
         opt_level: ['GENERIC', 'FAST']
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@0717577d45739eb3c851188b29f50ed6c0b2194e # v2.8.0
     - name: Install valgrind
       run: sudo apt-get install -y valgrind
     - name: Build