diff --git a/required_groonga_normalizer_mysql_version b/required_groonga_normalizer_mysql_version
index b0f3d96f8..66c4c2263 100644
--- a/required_groonga_normalizer_mysql_version
+++ b/required_groonga_normalizer_mysql_version
@@ -1 +1 @@
-1.0.8
+1.0.9