diff --git a/.github/workflows/stack-linter.yml b/.github/workflows/stack-linter.yml
index 0cc350c..7735eb6 100644
--- a/.github/workflows/stack-linter.yml
+++ b/.github/workflows/stack-linter.yml
@@ -33,13 +33,13 @@ jobs:
       # Checkout the code base #
       ##########################
       - name: Checkout Code
-        uses: actions/checkout@master
+        uses: actions/checkout@61b9e3751b92087fd0b06925ba6dd6314e06f089 # master (branch)
 
       #####################
       # Install Ruby Libs #
       #####################
       - name: Set up Ruby
-        uses: actions/setup-ruby@master
+        uses: actions/setup-ruby@a6583f17b2d46e754048ebc5ba8770189095d3a4 # master (branch)
         with:
           ruby-version: 2.6.x
 
@@ -47,7 +47,7 @@ jobs:
       # Install NPM Libs #
       ####################
       - name: Setup NPM
-        uses: actions/setup-node@master
+        uses: actions/setup-node@60c11408891ef62846c29c28c2374afe5c91fad5 # master (branch)
         with:
           node-version: 10.x