diff --git a/go.mod b/go.mod
index 2fc0855..5f03ef0 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.22.2
 
 require (
 	github.com/youta-t/its v0.5.2
-	golang.org/x/image v0.20.0
+	golang.org/x/image v0.21.0
 	golang.org/x/sync v0.8.0
 )
 
diff --git a/go.sum b/go.sum
index cb86770..2272c07 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,7 @@
 github.com/youta-t/its v0.5.2 h1:NtqF+yS8idQLzkXZuEJC0bD/cpHrDQKQyB+JRfI3mFs=
 github.com/youta-t/its v0.5.2/go.mod h1:BIW52yCMszkfw3y00YtIB5I5EP10+vVJFu3cV78DqlU=
-golang.org/x/image v0.20.0 h1:7cVCUjQwfL18gyBJOmYvptfSHS8Fb3YUDtfLIZ7Nbpw=
-golang.org/x/image v0.20.0/go.mod h1:0a88To4CYVBAHp5FXJm8o7QbUl37Vd85ply1vyD8auM=
+golang.org/x/image v0.21.0 h1:c5qV36ajHpdj4Qi0GnE0jUc/yuo33OLFaa0d+crTD5s=
+golang.org/x/image v0.21.0/go.mod h1:vUbsLavqK/W303ZroQQVKQ+Af3Yl6Uz1Ppu5J/cLz78=
 golang.org/x/mod v0.21.0 h1:vvrHzRwRfVKSiLrG+d4FMl/Qi4ukBCE6kZlTUkDYRT0=
 golang.org/x/mod v0.21.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
 golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=