diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c32355f..3ba6574 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -30,6 +30,7 @@ jobs:
           sudo apt-get -y install gdal-bin libgdal-dev
           ogrinfo --version
           python -m pip install --upgrade pip
+          pip install gdal==3.4.1  # pin to match apt version
           pip install --verbose .[dev]
       - name: Lint with flake8
         run: |
diff --git a/pyproject.toml b/pyproject.toml
index 7e3b830..e1492fe 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Operating System :: OS Independent",
 ]
-dependencies = ["geopandas>=0.13", "shapely>=2.0", "pyproj", "GDAL==3.4.1"]
+dependencies = ["geopandas>=0.13", "shapely>=2.0", "pyproj", "GDAL>=3.3"]
 
 [project.urls]
 "Homepage" = "https://github.com/nismod/irv-datapkg"