diff --git a/AutoCorrect.php b/AutoCorrect.php
index 344b09a..ca65aa2 100644
--- a/AutoCorrect.php
+++ b/AutoCorrect.php
@@ -30,7 +30,7 @@ public function auto_space($content)
     public function auto_correct($content)
     {
         foreach ($this->dicts as $from => $to) {
-            $content = preg_replace("/\b$from\b/i", $to, $content);
+            $content = preg_replace("/(?<!\.|[a-z]){$from}(?!\.|[a-z])/i", $to, $content);
         }
 
         return $content;