diff --git a/requirements/test.txt b/requirements/test.txt
index 06420d8..e286e94 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -20,6 +20,7 @@ types-tabulate >=0.9.0.0
 types-jsonschema >=4.17.0
 types-tqdm >=4.66.0
 types-xmltodict >=0.13.0.3
+numpy  # needed when running mypy on tests *shrug*
 
 sphinx
 sphinx_rtd_theme