diff --git a/access.lua b/access.lua
index f6deff1..41830af 100644
--- a/access.lua
+++ b/access.lua
@@ -2,6 +2,7 @@
 -- Load configuration
 --
 cache = ngx.shared.cache
+srvkey = cache:get("srvkey")
 oneweek = 60 * 60 * 24 * 7
 cookies = {}
 local conf_file = assert(io.open(conf_path, "r"), "Configuration file is missing")
diff --git a/init.lua b/init.lua
index ad29c90..41f67d1 100644
--- a/init.lua
+++ b/init.lua
@@ -12,7 +12,7 @@ hige = require "hige"
 
 -- Set random key
 math.randomseed(os.time())
-srvkey = math.random(1111111, 9999999)
+ngx.shared.cache:add("srvkey", math.random(1111111, 9999999))
 
 -- Shared table
 flashs = {}
@@ -20,6 +20,6 @@ login = {}
 logout = {}
 
 -- Path of the configuration
-conf_path = '/etc/ssowat/conf.json'
+conf_path = "/etc/ssowat/conf.json"
 
 ngx.log(ngx.INFO, "SSOwat ready")