diff --git a/mypy.ini b/mypy.ini
index 976ba0294..4ff4483ab 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -1,2 +1,3 @@
 [mypy]
+disallow_untyped_defs = True
 ignore_missing_imports = True
diff --git a/scripts/lint.sh b/scripts/lint.sh
index 11b59f2b9..6472f1845 100755
--- a/scripts/lint.sh
+++ b/scripts/lint.sh
@@ -3,6 +3,6 @@
 set -e
 set -x
 
-mypy fastapi --disallow-untyped-defs
+mypy fastapi
 black fastapi tests --check
 isort --multi-line=3 --trailing-comma --force-grid-wrap=0 --combine-as --line-width 88 --recursive --check-only --thirdparty fastapi fastapi tests