diff --git a/lib/xy.h b/lib/xy.h
index 4f25954..a5479e6 100644
--- a/lib/xy.h
+++ b/lib/xy.h
@@ -3,21 +3,23 @@
  * SPDX-License-Identifier: MIT
  * -------------------------------------------------------------
  * Lib Name      :    xy.h
- * Lib Authors   : Aoran Zeng <ccmywish@qq.com>
- *               |  Heng Guo  <2085471348@qq.com>
- * Contributors  :   juzeon   <skyjuzheng@gmail.com>
+ * Lib Authors   : Aoran Zeng  <ccmywish@qq.com>
+ *               |  Heng Guo   <2085471348@qq.com>
+ * Contributors  :   juzeon    <skyjuzheng@gmail.com>
+ *               | Mikachu2333 <mikachu.23333@zohomail.com>
  *               |
  * Created On    : <2023-08-28>
- * Last Modified : <2025-07-19>
+ * Last Modified : <2025-08-07>
  *
  * xy: 襄阳、咸阳
- * Corss-Platform C11 utilities for CLI applications in mixed flavor (mostly Ruby)
+ * Corss-Platform C11 utilities for CLI applications in mixed
+ * flavor (mostly Ruby)
  * ------------------------------------------------------------*/
 
 #ifndef XY_H
 #define XY_H
 
-#define _XY_Version       "v0.1.5.2-2025/07/19"
+#define _XY_Version       "v0.1.5.3-2025/08/07"
 #define _XY_Maintain_URL  "https://github.com/RubyMetric/chsrc/blob/dev/lib/xy.h"
 #define _XY_Maintain_URL2 "https://gitee.com/RubyMetric/chsrc/blob/dev/lib/xy.h"
 
@@ -377,6 +379,31 @@ xy_streql (const char *str1, const char *str2)
   return strcmp (str1, str2) == 0 ? true : false;
 }
 
+static bool
+xy_streql_ic(const char *str1, const char *str2)
+{
+  if (NULL == str1 || NULL == str2)
+  {
+    return false;
+  }
+
+  size_t len1 = strlen(str1);
+  size_t len2 = strlen(str2);
+  if (len1 != len2)
+  {
+    return false;
+  }
+
+  for (size_t i = 0; i < len1; i++)
+  {
+    if (tolower(str1[i]) != tolower(str2[i]))
+    {
+      return false;
+    }
+  }
+  return true;
+}
+
 static char *
 xy_str_to_quietcmd (const char *cmd)
 {
diff --git a/src/chsrc-main.c b/src/chsrc-main.c
index 0e178b6..0d138b5 100644
--- a/src/chsrc-main.c
+++ b/src/chsrc-main.c
@@ -402,7 +402,7 @@ iterate_targets_ (const char ***array, size_t size, const char *input, const cha
       alias = target[k];
       while (NULL!=alias)
         {
-          if (xy_streql (input, alias))
+          if (xy_streql_ic (input, alias))
             {
               matched = 1; break;
             }