diff --git a/README.md b/README.md
index 858cfb6..7ef7200 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ return [
 
     'config' => [
         'repeat' => true, // 重复替换为敏感词相同长度的字符
-        'replaceChar' => '*', // 替换字符
+        'replace_char' => '*', // 替换字符
         // 标记敏感词，标签生成<mark>敏感词</mark>
         'mark' => 'mark', 
     ],
@@ -101,7 +101,7 @@ class Index
 }
 
 ```
-依赖注入方式，推荐
+依赖注入方式
 ```php
 use isszz\sensitive\Sensitive;
 
diff --git a/src/Sensitive.php b/src/Sensitive.php
index 274498b..46f8d83 100644
--- a/src/Sensitive.php
+++ b/src/Sensitive.php
@@ -161,9 +161,7 @@ public function replace(string $content, string $replaceChar = '', bool $repeat
             throw new SensitiveException('Please fill in the content of the test', 1);
         }
 
-        if(!$replaceChar) {
-        	$replaceChar = $this->config['replaceChar'] ?? '';
-        }
+        $replaceChar = $replaceChar ?: $this->config['replace_char'];
 
         if(!$repeat) {
         	$repeat = $this->config['repeat'] ?? false;
diff --git a/src/config/plugin/isszz/webman-sensitive/app.php b/src/config/plugin/isszz/webman-sensitive/app.php
index 231685a..dab0d6a 100644
--- a/src/config/plugin/isszz/webman-sensitive/app.php
+++ b/src/config/plugin/isszz/webman-sensitive/app.php
@@ -8,7 +8,7 @@
     'mode' => 'file', 
     'config' => [
         'repeat' => true, // 重复替换为敏感词相同长度的字符
-        'replaceChar' => '*', // 替换字符
+        'replace_char' => '*', // 替换字符
         // 标记敏感词，标签生成<mark>敏感词</mark>
         'mark' => 'mark', 
     ],