diff --git a/requirements-dev.txt b/requirements-dev.txt
index 6707ef70c..bafbb8867 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,6 +1,5 @@
 black[jupyter]>=23.3.0
-janome>=0.4.2
-konoha<6.0.0
+konoha[janome]<6.0.0
 mypy>=1.2.0
 pytest>=7.3.1
 pytest-black-ng>=0.4.1