diff --git a/.github/workflows/ci-linux-python.yml b/.github/workflows/ci-linux-python.yml
index f48f72adf..b2b6b9d2d 100644
--- a/.github/workflows/ci-linux-python.yml
+++ b/.github/workflows/ci-linux-python.yml
@@ -28,7 +28,7 @@ jobs:
         run: sudo apt-get -y update && sudo apt-get install -y --no-install-recommends ninja-build libssl-dev libcurl4-openssl-dev python3 libpython3-dev python3-pip libblas-dev liblapack-dev
       
       - name: Install optional Python Packages 
-        run: python3 -m pip install numpy<=1.26.4 pyscf cma
+        run: python3 -m pip install "numpy<=1.26.4" pyscf cma
 
       - name: Configure
         working-directory: build/