diff --git a/go.mod b/go.mod
index e922e3a..4975552 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module example.com/game
 
-go 1.21.1
+go 1.21.3
 
 require github.com/hajimehoshi/ebiten/v2 v2.6.2