diff --git a/.github/workflows/download-emnist.yml b/.github/workflows/download-emnist.yml
index 3df8bd7..54722ed 100644
--- a/.github/workflows/download-emnist.yml
+++ b/.github/workflows/download-emnist.yml
@@ -21,7 +21,7 @@ jobs:
       run: |
         sudo apt-get update && sudo apt-get install -y libtinfo5
         python -m pip install --upgrade pip
-        pip install numpy<2 -U
+        pip install 'numpy<2' -U
         pip install torchvision==${{ matrix.torchvision-version }} -f https://download.pytorch.org/whl/torch_stable.html
         pip install setuptools
         pip install requests
diff --git a/.github/workflows/example-emnist.yml b/.github/workflows/example-emnist.yml
index d72abaf..90350f2 100644
--- a/.github/workflows/example-emnist.yml
+++ b/.github/workflows/example-emnist.yml
@@ -39,7 +39,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install numpy<2 -U
+        pip install 'numpy<2' -U
         pip install torch==${{ matrix.pytorch-version }}${{ matrix.pytorch-option }} torchvision==${{ matrix.torchvision-version }}${{ matrix.pytorch-option }} -f https://download.pytorch.org/whl/torch_stable.html
         pip install setuptools
         pip install requests
diff --git a/.github/workflows/example-plots.yml b/.github/workflows/example-plots.yml
index 0aca059..535fbcb 100644
--- a/.github/workflows/example-plots.yml
+++ b/.github/workflows/example-plots.yml
@@ -34,7 +34,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install numpy<2 -U
+        pip install 'numpy<2' -U
         pip install torch==${{ matrix.pytorch-version }}${{ matrix.pytorch-option }} -f https://download.pytorch.org/whl/torch_stable.html
         pip install matplotlib
         pip install setuptools
diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 2016504..a749efa 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -34,7 +34,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install numpy<2 -U
+        pip install 'numpy<2' -U
         pip install torch==${{ matrix.pytorch-version }}${{ matrix.pytorch-option }} -f https://download.pytorch.org/whl/torch_stable.html
     - name: Lint with flake8
       run: |