diff --git a/.github/workflows/run_unit_tests.yml b/.github/workflows/run_unit_tests.yml
index 1eab3926..0821ad9d 100644
--- a/.github/workflows/run_unit_tests.yml
+++ b/.github/workflows/run_unit_tests.yml
@@ -31,8 +31,8 @@ jobs:
             os: 'alpine3.20'
           - ruby: '3.2.2'
             os: 'alpine3.17'
-          - ruby: '3.1.0'
-            os: 'alpine3.15'
+          - ruby: '3.1.2'
+            os: 'alpine3.16'
 
     container:
       image: ruby:${{ matrix.ruby }}-${{ matrix.os }}
@@ -45,7 +45,7 @@ jobs:
 
     steps:
     - name: Checkout ${{ github.ref }}
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: print some info
       run: |