diff --git a/.github/workflows/run-unit-tests_conda-forge.yml b/.github/workflows/run-unit-tests_conda-forge.yml
index 45a2f8c..265b1d8 100644
--- a/.github/workflows/run-unit-tests_conda-forge.yml
+++ b/.github/workflows/run-unit-tests_conda-forge.yml
@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ macos-latest, ubuntu-latest, windows-latest ]
-        python-version: ['3.9', '3.11', '3.12']
+        python-version: ['3.8', '3.11', '3.12']
 
     steps:
     - name: Check out repository
@@ -35,7 +35,7 @@ jobs:
     - name: Install dependencies
       run: |
         conda info
-        conda install -c conda-forge rasterio opencv click tqdm pyyaml fsspec requests aiohttp pytest pytest-cov
+        conda install -c conda-forge rasterio opencv "numpy<2" click tqdm pyyaml fsspec requests aiohttp pytest pytest-cov
         conda list
 
     - name: Install OpenCV Linux dependencies
diff --git a/.github/workflows/run-unit-tests_pypi.yml b/.github/workflows/run-unit-tests_pypi.yml
index e6953dc..901888a 100644
--- a/.github/workflows/run-unit-tests_pypi.yml
+++ b/.github/workflows/run-unit-tests_pypi.yml
@@ -33,7 +33,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip install flake8 pytest pytest-cov
-        python -m pip install rasterio opencv-python-headless click tqdm pyyaml fsspec requests aiohttp
+        python -m pip install rasterio opencv-python-headless "numpy<2" click tqdm pyyaml fsspec requests aiohttp
         python -m pip list
 
     - name: Lint with flake8