diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 526ed4c..af0e840 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest,windows-latest,macos-latest,macos-14]
+        os: [ubuntu-20.04,windows-2019,macos-12,macos-14]
     steps:
     - name: Retrieve the source code
       uses: actions/checkout@v4
@@ -23,7 +23,7 @@ jobs:
     - name: Install MATLAB
       uses: matlab-actions/setup-matlab@v2
       with:
-        release: ${{ matrix.os == 'macos-14' && 'R2023b' || ( matrix.os == 'windows-latest' && 'R2021b' || 'R2021a' ) }}
+        release: ${{ matrix.os == 'macos-14' && 'R2023b' || ( matrix.os == 'windows-2019' && 'R2021b' || 'R2021a' ) }}
     - name: Build MATLAB MEX files
       uses: matlab-actions/run-command@v2
       with:
@@ -43,7 +43,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest,windows-latest,macos-latest,macos-14]
+        os: [ubuntu-20.04,windows-2019,macos-12,macos-14]
     steps:
     - name: Retrieve the source code
       uses: actions/checkout@v4