diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 8c545e9..e33545e 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -30,7 +30,8 @@ jobs:
       - name: Install Python packages
         run: |
           edm install -y enable
-          edm install -y numpy 
+          edm install -y numpy
+          edm install -y matplotlib
           edm shell
           edm run -- python -m pip install tqdm flake8 pytest pyptv \
           --index-url https://pypi.fury.io/pyptv \