diff --git a/.github/workflows/compile-check.yaml b/.github/workflows/compile-check.yaml
index 1814d05..3e91fe7 100644
--- a/.github/workflows/compile-check.yaml
+++ b/.github/workflows/compile-check.yaml
@@ -8,9 +8,9 @@ jobs:
   compile:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
 
-      - uses: arduino/setup-arduino-cli@v2
+      - uses: arduino/setup-arduino-cli@81d310742121c928ea9c8bbd407b4217b432ae02 # v2
 
       - name: Install ESP32 core
         run: |
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 37436c5..635ef82 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -15,7 +15,7 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
         with:
           ref: main
 
@@ -50,7 +50,7 @@ jobs:
           git push origin ${{ inputs.version }}
 
       - name: Create GitHub Release
-        uses: softprops/action-gh-release@v3
+        uses: softprops/action-gh-release@718ea10b132b3b2eba29c1007bb80653f286566b # v3
         with:
           tag_name: ${{ inputs.version }}
           generate_release_notes: true