diff --git a/go.mod b/go.mod
index b146085..9f1fe8b 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/int128/oauth2cli
 
-go 1.23.0
+go 1.24.0
 
 toolchain go1.25.1
 
@@ -8,7 +8,7 @@ require (
 	github.com/google/go-cmp v0.7.0
 	github.com/int128/listener v1.3.0
 	github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c
-	golang.org/x/oauth2 v0.30.0
+	golang.org/x/oauth2 v0.31.0
 	golang.org/x/sync v0.16.0
 )
 
diff --git a/go.sum b/go.sum
index 8f7292c..5c88603 100644
--- a/go.sum
+++ b/go.sum
@@ -4,8 +4,8 @@ github.com/int128/listener v1.3.0 h1:ZFePbpzFUt1i6hBSY15rzqo8tHZHJPPQkqCtgOAwS8g
 github.com/int128/listener v1.3.0/go.mod h1:zF9mx2wn+2J/7Idmxi5kgqrGgERr6vr8fK8KqENrRZ0=
 github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c h1:+mdjkGKdHQG3305AYmdv1U2eRNDiU2ErMBj1gwrq8eQ=
 github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c/go.mod h1:7rwL4CYBLnjLxUqIJNnCWiEdr3bn6IUYi15bNlnbCCU=
-golang.org/x/oauth2 v0.30.0 h1:dnDm7JmhM45NNpd8FDDeLhK6FwqbOf4MLCM9zb1BOHI=
-golang.org/x/oauth2 v0.30.0/go.mod h1:B++QgG3ZKulg6sRPGD/mqlHQs5rB3Ml9erfeDY7xKlU=
+golang.org/x/oauth2 v0.31.0 h1:8Fq0yVZLh4j4YA47vHKFTa9Ew5XIrCP8LC6UeNZnLxo=
+golang.org/x/oauth2 v0.31.0/go.mod h1:lzm5WQJQwKZ3nwavOZ3IS5Aulzxi68dUSgRHujetwEA=
 golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
 golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
 golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=