diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index edd3695..9326d24 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -22,7 +22,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install pytest rocrate
+          pip install pytest rocrate jsonschema
       - name: Test with pytest
         run: |
           pytest --tb=no -s