diff --git a/CubeProxy/lua/init_worker_phase.lua b/CubeProxy/lua/init_worker_phase.lua
index 83392f6e..1eb3170f 100644
--- a/CubeProxy/lua/init_worker_phase.lua
+++ b/CubeProxy/lua/init_worker_phase.lua
@@ -1,3 +1,10 @@
+-- In OpenResty, math.randomseed should be called in the init_worker phase.
+-- Without this, all worker processes would start with the same seed (typically 1),
+-- causing math.random() to return the same sequence of values across all workers.
+-- This is critical for cache TTL jitter and other randomized behaviors to ensure
+-- they are truly distributed and don't lead to synchronized stampedes.
+math.randomseed(ngx.now() * 1000 + ngx.worker.id())
+
 local function monitor_cache_usage()
     local cache_free_space = ngx.shared.local_cache:free_space()
     ngx.shared.local_cache:set("cache_free_space", cache_free_space)