diff --git a/.github/workflows/test-n-publish.yml b/.github/workflows/test-n-publish.yml
index d6133c7..9958a4c 100644
--- a/.github/workflows/test-n-publish.yml
+++ b/.github/workflows/test-n-publish.yml
@@ -20,6 +20,7 @@ jobs:
         python -m pip install --upgrade pip
         python -m pip install codecov requests
         python -m pip install bs4
+        sudo apt-get install graphviz
         python -m pip install pygraphviz
         python -m pip install kerncraft
         python -m pip install -e .