diff --git a/ST.Library.UI.STTextBox/Implementation/StyleMonitor/SelectionStyleMonitor.cs b/ST.Library.UI.STTextBox/Implementation/StyleMonitor/SelectionStyleMonitor.cs
index 443d8dd..0a041ff 100644
--- a/ST.Library.UI.STTextBox/Implementation/StyleMonitor/SelectionStyleMonitor.cs
+++ b/ST.Library.UI.STTextBox/Implementation/StyleMonitor/SelectionStyleMonitor.cs
@@ -41,10 +41,14 @@ public void OnSelectionChanged(TextManager textManager, int nStart, int nLen) {
                 }
                 return false;
             });
-            if (!string.IsNullOrEmpty(strKey))  {
+            if (!string.IsNullOrEmpty(strKey)) {
                 string strText = textManager.GetText();
                 List<TextStyleRange> lst = new List<TextStyleRange>();
-                foreach (Match m in Regex.Matches(strText, "\\b" + strKey + "\\b")) {
+                if ("* . ? + $ ^ [ ] ( ) { } | \\ /".Split(' ').Contains(strKey))
+                {
+                    strKey = "\\" + strKey;
+                }
+                foreach (Match m in Regex.Matches(strText, "\\b" + strKey + "\\b")) { // * . ? + $ ^ [ ] ( ) { } | \ /
                     lst.Add(new TextStyleRange() {
                         Index = m.Index,
                         Length = m.Length,