diff --git a/LANG/lang_en.lua b/LANG/lang_en.lua
index 5cf0efd5..6963e8e0 100644
--- a/LANG/lang_en.lua
+++ b/LANG/lang_en.lua
@@ -68,6 +68,7 @@ return{
 	registerSuccessed="Registered!",
 	registerFailed="Registration failed",
 	netErrorCode="Network error code",
+	jsonError="Json error",
 	noUsername="Please enter your username",
 	wrongEmail="Wrong email address",
 	noPassword="Please enter your password",
diff --git a/LANG/lang_symbol.lua b/LANG/lang_symbol.lua
index 6bf2dec4..88a22550 100644
--- a/LANG/lang_symbol.lua
+++ b/LANG/lang_symbol.lua
@@ -68,6 +68,7 @@ return{
 	registerSuccessed="Register successed!",
 	registerFailed="Register failed",
 	netErrorCode="Network error code",
+	jsonError="Json error",
 	noUsername="Input username",
 	wrongEmail="Wrong email address",
 	noPassword="Input password",
diff --git a/LANG/lang_zh.lua b/LANG/lang_zh.lua
index 07f951cc..dfe5d287 100644
--- a/LANG/lang_zh.lua
+++ b/LANG/lang_zh.lua
@@ -68,6 +68,7 @@ return{
 	registerSuccessed="注册成功!",
 	registerFailed="注册失败",
 	netErrorCode="网络错误码",
+	jsonError="json错误",
 	noUsername="请填写用户名",
 	wrongEmail="邮箱格式错误",
 	noPassword="请填写密码",
diff --git a/Zframework/toolfunc.lua b/Zframework/toolfunc.lua
index 88672fd1..36531272 100644
--- a/Zframework/toolfunc.lua
+++ b/Zframework/toolfunc.lua
@@ -300,7 +300,9 @@ do--json
 		error("unexpected type '" .. t .. "'")
 	end
 
-	function json.encode(val) return encode(val) end
+	function json.encode(val)
+		return pcall(encode,val)
+	end
 
 	-------------------------------------------------------------------------------
 	-- Decode
@@ -516,7 +518,7 @@ do--json
 		decode_error(str, idx, "unexpected character '" .. chr .. "'")
 	end
 
-	function json.decode(str)
+	local function decode(str)
 		if type(str) ~= "string" then
 			error("expected argument of type string, got " .. type(str))
 		end
@@ -525,6 +527,9 @@ do--json
 		if idx <= #str then decode_error(str, idx, "trailing garbage") end
 		return res
 	end
+	function json.decode(str)
+		return pcall(decode,str)
+	end
 end
 function copyList(org)
 	local L={}
diff --git a/parts/tick.lua b/parts/tick.lua
index d5fd8be1..71c72bcf 100644
--- a/parts/tick.lua
+++ b/parts/tick.lua
@@ -78,12 +78,16 @@ function Tick.httpREQ_launch(data)
 	local res,err=client.poll(data.task)
 	if res then
 		if res.code==200 then
-			res=json.decode(res.body)
-			LOG.print(res.notice,360,color.sky)
-			if gameVersion==res.version then
-				LOG.print(text.versionIsNew,360,color.sky)
+			err,res=json.decode(res.body)
+			if res then
+				LOG.print(res.notice,360,color.sky)
+				if gameVersion==res.version then
+					LOG.print(text.versionIsNew,360,color.sky)
+				else
+					LOG.print(string.gsub(text.versionIsOld,"$1",res.version),"warn")
+				end
 			else
-				LOG.print(string.gsub(text.versionIsOld,"$1",res.version),"warn")
+				LOG.print(text.jsonError..": "..err,"warn")
 			end
 		else
 			LOG.print(text.netErrorCode..res.code,"warn")
@@ -103,11 +107,15 @@ function Tick.httpREQ_register(data)
 	local res,err=client.poll(data.task)
 	if res then
 		if res.code==200 then
-			res=json.decode(res.body)
-			if res.status then
-				LOG.print(text.registerSuccessed)
+			err,res=json.decode(res.body)
+			if res then
+				if res.status then
+					LOG.print(text.registerSuccessed)
+				else
+					LOG.print(text.registerFailed..": "..res.msg)
+				end
 			else
-				LOG.print(text.registerFailed..": "..res.msg)
+				LOG.print(text.jsonError..": "..err,"warn")
 			end
 		else
 			LOG.print(text.netErrorCode..res.code,"warn")