diff --git a/src/main/java/in/koreatech/koin/global/validation/EmojiValidator.java b/src/main/java/in/koreatech/koin/global/validation/EmojiValidator.java
index 066dd9179..316116137 100644
--- a/src/main/java/in/koreatech/koin/global/validation/EmojiValidator.java
+++ b/src/main/java/in/koreatech/koin/global/validation/EmojiValidator.java
@@ -20,6 +20,9 @@ public void initialize(NotEmoji constraintAnnotation) {
 
     @Override
     public boolean isValid(String field, ConstraintValidatorContext constraintValidatorContext) {
+        if (field == null) {
+            return true;
+        }
         Matcher emojiMatcher = EMOJI_PATTERN.matcher(field);
         if (emojiMatcher.find()) {
             return false;