diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 9771a6f8..af5596b5 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -7,10 +7,11 @@ jobs:
 
     runs-on: ${{ matrix.os }}
     strategy:
-      max-parallel: 4
+      max-parallel: 8
       matrix:
-        python-version: [3.7, 3.8]
-        os: [ubuntu-20.04, macos-10.15] # , windows-2019]
+        python-version: [3.7, 3.8, 3.9]
+        os: [ubuntu-20.04, macos-10.15]
+        gdal: [3.0.4,3.1.0,3.2.0,3.3.0]
         
     steps:
     - uses: actions/checkout@v1
@@ -22,17 +23,18 @@ jobs:
       if: runner.os == 'Linux'
       run: |
         sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable
-        sudo apt-get install -y libproj-dev libgeos-dev libspatialite-dev libgdal-dev gdal-bin netcdf-bin
+        sudo apt-get install -y libproj-dev libgeos-dev libspatialite-dev libgdal-dev netcdf-bin
+        sudo apt-get install gdal-bin=${{matrix.gdal}}
         gdal-config --version
     - name: Install system dependencies (macOS)
       if: runner.os == 'macOS'
       run: |
-        brew install pkg-config gdal proj geos
-        gdal-config --version
-    - name: Install system dependencies (Windows)
-      if: runner.os == 'Windows'
-      run: |
-        nuget install GDAL -Version 2.4.4
+         brew tap-new $USER/local-gdal
+         brew extract --version=${{matrix.gdal}} gdal $USER/local-gdal
+         brew install gdal@${{matrix.gdal}}
+         brew install pkg-config proj geos
+         gdal-config --version
+         
     - name: Install pygdal Python package (Ubuntu)
       if: runner.os == 'Linux'
       # see https://stackoverflow.com/a/17311033
@@ -44,11 +46,6 @@ jobs:
       if: runner.os == 'macOS'
       run: |
         pip install pygdal=="`gdal-config --version`.*"
-    - name: Install pygdal Python package (Windows)
-      # https://trac.osgeo.org/gdal/wiki/DownloadingGdalBinaries#Windows
-      if: runner.os == 'Windows'
-      run: |
-        pip install pygdal=="2.4.4.*"
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
@@ -59,4 +56,4 @@ jobs:
     - name: Test with pytest
       run: |
         pip install -r requirements-dev.txt
-        pytest
\ No newline at end of file
+        pytest