diff --git a/go.mod b/go.mod
index 0b44ed3..ea28c52 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module git.yetaga.in/alazyreader/libyear
 
-go 1.25.1
+go 1.26.0
 
-require golang.org/x/mod v0.40.0
+require golang.org/x/mod v0.41.0
diff --git a/go.sum b/go.sum
index b4d25a8..b74882d 100644
--- a/go.sum
+++ b/go.sum
@@ -24,3 +24,5 @@ golang.org/x/mod v0.39.0 h1:UF5zwQdCRRUpHfyPwr7d4UrGiVeldIsogtzWVnczL74=
 golang.org/x/mod v0.39.0/go.mod h1:bvIbwjQ0HUFFf5AKukeeYQG4ZBUG9yxQbR9aEweIwYY=
 golang.org/x/mod v0.40.0 h1:hUv+3cXcdRHz08UmSiOob7sadHig73uo5bkXxQ/tvUs=
 golang.org/x/mod v0.40.0/go.mod h1:0/weTWkPWGBikyTWAX3dkjVztMmBA5hM0DH6BElSupE=
+golang.org/x/mod v0.41.0 h1:qJmnOUb4YB+FsEuM3HcWucdZASCPGhsX6uljO6pog0c=
+golang.org/x/mod v0.41.0/go.mod h1:Ek9pY8RKWXwsWvd3rQiHYtMqkjSUV+s1Rj7j4H5Ur6o=