diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..deb39e9
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,12 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directories:
+      - ".github/workflows"
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 15
+    commit-message:
+      prefix: "build"
+      include: "scope"
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0d3be48..383c9a6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 #v2
     - name: submodules
       run: git submodule update --init --recursive
     - name: cmake