diff --git a/flake.lock b/flake.lock
index 6391759..4b41405 100644
--- a/flake.lock
+++ b/flake.lock
@@ -167,11 +167,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1690569970,
-        "narHash": "sha256-Lf1LLHyi+hajpj3dJqjMRgLMU2Fr++JEOdJyhBaxaWQ=",
+        "lastModified": 1701336116,
+        "narHash": "sha256-kEmpezCR/FpITc6yMbAh4WrOCiT2zg5pSjnKrq51h5Y=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "66ce081fafa2dca0038006ec7c6482d7a11d13d8",
+        "rev": "f5c27c6136db4d76c30e533c20517df6864c46ee",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 7c72964..330f4e5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,7 +18,7 @@
       {
         packages = gitPackages // {
           default = pkgs.callPackage ./. {
-            buildGoModule = pkgs.buildGo120Module;
+            buildGoModule = pkgs.buildGo121Module;
             commit = self.sourceInfo.rev or null;
           };
         };
diff --git a/go.mod b/go.mod
index a4e46db..18333c7 100644
--- a/go.mod
+++ b/go.mod
@@ -14,7 +14,7 @@
 
 module gg-scm.io/tool
 
-go 1.20
+go 1.21.4
 
 require (
 	gg-scm.io/pkg/ghdevice v0.1.0
diff --git a/go.sum b/go.sum
index fb7b04a..9425cff 100644
--- a/go.sum
+++ b/go.sum
@@ -30,6 +30,8 @@ cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0Zeo
 cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
+crawshaw.io/iox v0.0.0-20181124134642-c51c3df30797 h1:yDf7ARQc637HoxDho7xjqdvO5ZA2Yb+xzv/fOnnvZzw=
+crawshaw.io/iox v0.0.0-20181124134642-c51c3df30797/go.mod h1:sXBiorCo8c46JlQV3oXPKINnZ8mcqnye1EkVkqsectk=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 gg-scm.io/pkg/ghdevice v0.1.0 h1:WF7J5QPL/D9jMCmycpvb87zJceQwsNTHjU9Mn/2wyAU=
 gg-scm.io/pkg/ghdevice v0.1.0/go.mod h1:Cm60XpVqtWmOy5W109MLJ9KBlw25oHEliw/9ivICTQA=
@@ -174,6 +176,7 @@ golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.11.0 h1:bUO06HqtnRcc/7l71XBe4WcqTZ+3AH1J59zWDDwLKgU=
+golang.org/x/mod v0.11.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -201,6 +204,7 @@ golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81R
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.1.0 h1:hZ/3BUoy5aId7sCpA/Tc5lt8DkFgdVS2onTpJsZ/fl0=
+golang.org/x/net v0.1.0/go.mod h1:Cx3nUiGt4eDBEyega/BKRp+/AlGL8hYe7U9odMt2Cco=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=