diff --git a/backend/src/main/java/com/openisle/model/Notification.java b/backend/src/main/java/com/openisle/model/Notification.java
index 202bf2e30..7ee0aaf94 100644
--- a/backend/src/main/java/com/openisle/model/Notification.java
+++ b/backend/src/main/java/com/openisle/model/Notification.java
@@ -22,7 +22,7 @@ public class Notification {
     private Long id;
 
     @Enumerated(EnumType.STRING)
-    @Column(nullable = false)
+    @Column(nullable = false, length = 50)
     private NotificationType type;
 
     @ManyToOne(fetch = FetchType.LAZY, optional = false)