diff --git a/README.md b/README.md
index d221a24..b68ccd8 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,7 @@ Create `config/initializers/rucaptcha.rb`
 RuCaptcha.configure do
   # Custom captcha code expire time if you need, default: 2 minutes
   # self.expires_in = 120
+
   # [Requirement / 重要]
   # Store Captcha code where, this config more like Rails config.cache_store
   # default: Read config info from `Rails.application.config.cache_store`
@@ -44,10 +45,22 @@ RuCaptcha.configure do
   # 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 = :mem_cache_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
   # self.skip_cache_store_check = true
+
   # Chars length, default: 5, allows: [3 - 7]
   # self.length = 5
+
+  # Enable or disable Strikethrough, default: true
+  # self.line = true
+
+  # Enable or disable noise, default: false
+  # self.noise = false
+
+  # Set the image format, default: png, allows: [jpeg, png, webp]
+  # self.format = 'png'
 end
 ```
 
diff --git a/lib/rucaptcha/version.rb b/lib/rucaptcha/version.rb
index ab019f5..47b3a2b 100644
--- a/lib/rucaptcha/version.rb
+++ b/lib/rucaptcha/version.rb
@@ -1,3 +1,3 @@
 module RuCaptcha
-  VERSION = "3.1.4"
+  VERSION = "3.2.0"
 end