diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bae808d38..565a4405d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -145,6 +145,7 @@ jobs:
         # numpy-quaternion needs numpy<2.0.0. Chose 1.26.4 as it is the lowest working version for ubuntu 24.04.
         pip3 install --force-reinstall numpy==1.26.4
         pip3 install numpy-quaternion tqdm pyyaml
+        pip3 install typing_extensions
 
     - name: Run Tests
       run: |