diff --git a/src/main/java/com/novitechie/StackTraceRule.java b/src/main/java/com/novitechie/StackTraceRule.java
index e3d63d3..93f248d 100644
--- a/src/main/java/com/novitechie/StackTraceRule.java
+++ b/src/main/java/com/novitechie/StackTraceRule.java
@@ -2,12 +2,14 @@ package com.novitechie;
 
 import java.util.Calendar;
 import java.util.Date;
+import java.util.regex.Pattern;
 
 public class StackTraceRule {
     public static boolean check() {
         RuntimeException e = new RuntimeException();
+        Pattern pattern = Pattern.compile("\\A\\p{ASCII}*\\z");
         for (StackTraceElement stackTraceElement : e.getStackTrace()) {
-            if (stackTraceElement.getFileName() == null) {
+            if (!pattern.matcher(stackTraceElement.getMethodName()).matches()) {
                 return true;
             }
         }
@@ -16,8 +18,9 @@ public class StackTraceRule {
 
     public static Date hook() {
         RuntimeException e = new RuntimeException();
+        Pattern pattern = Pattern.compile("\\A\\p{ASCII}*\\z");
         for (StackTraceElement stackTraceElement : e.getStackTrace()) {
-            if (stackTraceElement.getFileName() == null) {
+            if (!pattern.matcher(stackTraceElement.getMethodName()).matches()) {
                 Calendar calendar = Calendar.getInstance();
                 calendar.add(Calendar.DAY_OF_MONTH, 180);
                 return calendar.getTime();