diff --git a/docker-compose.yml b/docker-compose.yml
index ec8dbf6..d33bf63 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -23,6 +23,7 @@ services:
       - CAPTCHA_COOKIE_SECRET=
       - POW_COOKIE_SECRET=
       - RAY_ID=
+      - BUCKET_DURATION=43200
   nginx:
     image: "nginx:latest"
     volumes:
diff --git a/src/libs/utils.lua b/src/libs/utils.lua
index d317008..0a0ad13 100644
--- a/src/libs/utils.lua
+++ b/src/libs/utils.lua
@@ -1,8 +1,8 @@
 local _M = {}
 
 local sha = require("sha")
-local secret_bucket_duration = 43200 -- 60 * 60 * 12 -- 12 hours
-require("print_r")
+local secret_bucket_duration = tonumber(os.getenv("BUCKET_DURATION"))
+
 function _M.generate_secret(context, salt, is_applet, iterations)
 	local start_sec = core.now()['sec']
 	local bucket = start_sec - (start_sec % secret_bucket_duration)