diff --git a/part/Setting.nix b/part/Setting.nix
index 686d4496..e7ecb07c 100644
--- a/part/Setting.nix
+++ b/part/Setting.nix
@@ -54,6 +54,6 @@
 
 	top.refresh = "2000";
 
-	brightness.step = "10";
+	brightness.step = "5";
 	volume.step     = "5";
 }