diff --git a/app/src/main/java/kr/co/vividnext/sodalive/mypage/can/coupon/CanCouponActivity.kt b/app/src/main/java/kr/co/vividnext/sodalive/mypage/can/coupon/CanCouponActivity.kt
index 99aaa45..f52043e 100644
--- a/app/src/main/java/kr/co/vividnext/sodalive/mypage/can/coupon/CanCouponActivity.kt
+++ b/app/src/main/java/kr/co/vividnext/sodalive/mypage/can/coupon/CanCouponActivity.kt
@@ -3,8 +3,6 @@ package kr.co.vividnext.sodalive.mypage.can.coupon
 import android.content.Intent
 import android.os.Bundle
 import android.text.InputFilter
-import android.text.SpannableStringBuilder
-import android.text.Spanned
 import android.widget.Toast
 import kr.co.vividnext.sodalive.base.BaseActivity
 import kr.co.vividnext.sodalive.common.LoadingDialog
@@ -12,6 +10,7 @@ import kr.co.vividnext.sodalive.databinding.ActivityCanCouponBinding
 import kr.co.vividnext.sodalive.mypage.can.status.CanStatusActivity
 import org.koin.android.ext.android.inject
 
+
 class CanCouponActivity : BaseActivity<ActivityCanCouponBinding>(
     ActivityCanCouponBinding::inflate
 ) {
@@ -30,16 +29,7 @@ class CanCouponActivity : BaseActivity<ActivityCanCouponBinding>(
 
         binding.toolbar.tvBack.text = "쿠폰등록"
         binding.toolbar.tvBack.setOnClickListener { finish() }
-
-        val uppercaseAndDigitsFilter = InputFilter { source, _, _, _, _, _ ->
-            val filtered = source.filter { it.isUpperCase() || it.isDigit() }
-            if (source is Spanned) {
-                return@InputFilter SpannableStringBuilder(filtered)
-            } else {
-                return@InputFilter filtered
-            }
-        }
-        binding.etCouponNumber.filters = arrayOf(uppercaseAndDigitsFilter)
+        binding.etCouponNumber.filters = arrayOf(InputFilter.AllCaps())
 
         binding.tvRegistration.setOnClickListener {
             val couponNumber = binding.etCouponNumber.text.toString()