diff --git a/.github/workflows/helm-chart.yml b/.github/workflows/helm-chart.yml
index 4d6d47617..94fda7280 100644
--- a/.github/workflows/helm-chart.yml
+++ b/.github/workflows/helm-chart.yml
@@ -19,7 +19,7 @@ jobs:
     name: lint + unittest + render matrix
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           fetch-depth: 0
 
@@ -32,7 +32,7 @@ jobs:
         run: helm plugin install --version 0.8.2 https://github.com/helm-unittest/helm-unittest
 
       - name: Set up Python (for chart-testing)
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: "3.12"
 
@@ -67,7 +67,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: lint-and-unittest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
         with:
           fetch-depth: 0
 
@@ -77,7 +77,7 @@ jobs:
           version: v3.16.4
 
       - name: Set up Python (for chart-testing)
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: "3.12"