diff --git a/config/initializers/rucaptcha.rb b/config/initializers/rucaptcha.rb
index 79f546a..0b1917d 100644
--- a/config/initializers/rucaptcha.rb
+++ b/config/initializers/rucaptcha.rb
@@ -10,7 +10,7 @@
   # But RuCaptcha requirements cache_store not in [:null_store, :memory_store, :file_store]
   # 默认：会从 Rails 配置的 cache_store 里面读取相同的配置信息，并尝试用可以运行的方式，用于存储验证码字符
   # 但如果是 [:null_store, :memory_store, :file_store] 之类的，你可以通过下面的配置项单独给 RuCaptcha 配置 cache_store
-  self.cache_store = :memory_store
+  # self.cache_store = :memory_store
 
   # If you wants disable `cache_store` check warning, you can do it, default: false
   # 如果想要 disable cache_store 的 warning，就设置为 true，default false