diff --git a/.github/workflows/build-test-wheel.yml b/.github/workflows/build-test-wheel.yml
index 78bc68e7..41b72703 100644
--- a/.github/workflows/build-test-wheel.yml
+++ b/.github/workflows/build-test-wheel.yml
@@ -21,7 +21,7 @@ jobs:
     - name: Install pip dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install forthon numpy==1.26.4 h5py
+        python -m pip install forthon numpy==1.24.3 h5py
         python -m pip install flake8
         python -m pip install pytest-isolate pytest-xdist
     - name: Build UEDGE