diff --git a/requirements/optional.txt b/requirements/optional.txt
index a93bb9c43b..f7dcdfda44 100644
--- a/requirements/optional.txt
+++ b/requirements/optional.txt
@@ -1,4 +1,4 @@
-mmcls>=0.15.0
+mmcls>=0.15.0,<=0.19.0
 mmdet>=2.19.0
 mmedit
 mmocr==0.3.0