diff --git a/.github/workflows/Unit Tests.yml b/.github/workflows/Unit Tests.yml
index 9acb4f7..32b231e 100644
--- a/.github/workflows/Unit Tests.yml	
+++ b/.github/workflows/Unit Tests.yml	
@@ -18,9 +18,9 @@ jobs:
         python-version: [3.7, 3.8, 3.9]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@e9aba2c848f5ebd159c070c61ea2c4e2b122355e # v2
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies