diff --git a/Makefile b/Makefile
index 8ffd3ea..39ebc2a 100644
--- a/Makefile
+++ b/Makefile
@@ -46,7 +46,7 @@ else
 endif
 
 ifneq ($(shell echo $(VERSION) | head -c 1), v)
-	VERSION=v0.4
+	VERSION=v0.5
 endif
 CFLAGS += -DVERSION=\"$(VERSION)\"
 
diff --git a/README.md b/README.md
index dd63a7b..82dcf84 100644
--- a/README.md
+++ b/README.md
@@ -230,7 +230,7 @@ Linux provides a way to limit the `ptrace(2)`: set the value of [`/proc/sys/kern
 
 ### Does it support macOS?
 
-No. macOS's [`ptrace(2)`](http://polarhome.com/service/man/?qf=ptrace&af=0&sf=0&of=Darwin&tf=2) is useless. ~~However, it can also be achieved theoretically by referring to `DTrace`~~. See [issue 12](https://github.com/hmgle/graftcp/issues/12). Anyone try it? :grin:
+No. macOS's [`ptrace(2)`](http://polarhome.com/service/man/?qf=ptrace&af=0&sf=0&of=Darwin&tf=2) is useless. ~~However, it can also be achieved theoretically by referring to `DTrace`~~. See [issue 12](https://github.com/hmgle/graftcp/issues/12).
 
 ## TODO
 
diff --git a/README.zh-CN.md b/README.zh-CN.md
index 928d878..904aa2c 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -223,7 +223,7 @@ Linux 提供了一种限制被 `ptrace(2)` 跟踪的方法：设置 [`/proc/sys/
 
 ### 支持 macOS 吗？
 
-不。macOS 的 [`ptrace(2)`](http://polarhome.com/service/man/?qf=ptrace&af=0&sf=0&of=Darwin&tf=2) 是个半残品。~~不过理论上参考 DTrace那一套也能实现~~，见[issue 12](https://github.com/hmgle/graftcp/issues/12)。或许有兴趣的同学可以趟下这趟浑水 :grin:
+不。macOS 的 [`ptrace(2)`](http://polarhome.com/service/man/?qf=ptrace&af=0&sf=0&of=Darwin&tf=2) 是个半残品。~~不过理论上参考 DTrace那一套也能实现~~，见[issue 12](https://github.com/hmgle/graftcp/issues/12)。
 
 ## TODO
 
diff --git a/graftcp.c b/graftcp.c
index 820d34f..22def87 100644
--- a/graftcp.c
+++ b/graftcp.c
@@ -20,7 +20,7 @@
 #include "string-set.h"
 
 #ifndef VERSION
-#define VERSION "v0.4"
+#define VERSION "v0.5"
 #endif
 
 struct sockaddr_in PROXY_SA;
diff --git a/local/Makefile b/local/Makefile
index 46e04e2..d62c754 100644
--- a/local/Makefile
+++ b/local/Makefile
@@ -1,5 +1,5 @@
 ifneq ($(shell echo $(VERSION) | head -c 1), v)
-	VERSION=v0.4
+	VERSION=v0.5
 endif
 
 GO_BUILD_PREFIX_FLAGS :=
diff --git a/local/cmd/graftcp-local/main.go b/local/cmd/graftcp-local/main.go
index 16e7672..7d4ae52 100644
--- a/local/cmd/graftcp-local/main.go
+++ b/local/cmd/graftcp-local/main.go
@@ -13,7 +13,7 @@ import (
 
 var (
 	selectProxyMode string
-	version         = "v0.4"
+	version         = "v0.5"
 )
 
 // App for graftcp-local.
diff --git a/local/cmd/mgraftcp/main.go b/local/cmd/mgraftcp/main.go
index 18a3673..514e00b 100644
--- a/local/cmd/mgraftcp/main.go
+++ b/local/cmd/mgraftcp/main.go
@@ -63,7 +63,7 @@ var (
 	help        bool
 	showVersion bool
 
-	version = "v0.4"
+	version = "v0.5"
 )
 
 func init() {
diff --git a/util.c b/util.c
index efb516d..ee6e2be 100644
--- a/util.c
+++ b/util.c
@@ -1,6 +1,6 @@
 /*
  * graftcp
- * Copyright (C) 2018 Hmgle <dustgle@gmail.com>
+ * Copyright (C) 2018, 2021 Hmgle <dustgle@gmail.com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by