diff --git a/.github/workflows/CreateAndTestRelease.yml b/.github/workflows/CreateAndTestRelease.yml
index 646dce3..303db76 100644
--- a/.github/workflows/CreateAndTestRelease.yml
+++ b/.github/workflows/CreateAndTestRelease.yml
@@ -32,7 +32,7 @@ jobs:
     needs: update_version
     strategy:
       matrix:
-        os: [ubuntu-18.04, macos-latest, windows-latest]
+        os: [ubuntu-18.04]
         pyversion: [3.6, 3.7, 3.8, 3.9, "3.10"]
     steps:
     - uses: actions/checkout@v2
@@ -116,7 +116,7 @@ jobs:
     needs: build_pymeshlab
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest]
         pyversion: [3.6, 3.7, 3.8, 3.9, "3.10"]
     steps:
     - name: Download PyMeshLab_${{ runner.os }}_python${{ matrix.pyversion }}
@@ -147,7 +147,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest]
         pyversion: [3.6, 3.7, 3.8, 3.9, "3.10"]
     steps:
     - name: Download pymeshlab_whl_${{ runner.os }}_python${{ matrix.pyversion }}
@@ -201,7 +201,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        os: [Linux, macOS, Windows]
+        os: [Linux]
         pyversion: [3.6, 3.7, 3.8, 3.9, "3.10"]
     steps:
     #download zip package