diff --git a/pyproject.toml b/pyproject.toml
index 1c9191b0..71941c9c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,5 +41,6 @@ module = [
     "iminuit",
     "jsonschema",
     "scipy.*",
+    "coffea.*"
 ]
 ignore_missing_imports = true