diff --git a/LICENSE b/LICENSE
index 447139d..ed33663 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017 - 2022 Weilin Shi
+Copyright (c) 2017 - 2023 Weilin Shi
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/go.mod b/go.mod
index c69732d..bc8da2c 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/steambap/captcha
 
-go 1.16
+go 1.17
 
 require (
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0