diff --git a/backend/ddang/src/main/java/com/ddang/ddang/chat/handler/dto/SendMessageStatus.java b/backend/ddang/src/main/java/com/ddang/ddang/chat/handler/dto/SendMessageStatus.java
index 0a7b7ba1f..d030f4801 100644
--- a/backend/ddang/src/main/java/com/ddang/ddang/chat/handler/dto/SendMessageStatus.java
+++ b/backend/ddang/src/main/java/com/ddang/ddang/chat/handler/dto/SendMessageStatus.java
@@ -4,6 +4,5 @@ public enum SendMessageStatus {
 
     SUCCESS,
     DISCONNECTED,
-    FORBIDDEN,
-    ;
+    FORBIDDEN
 }
diff --git a/backend/ddang/src/main/java/com/ddang/ddang/websocket/handler/dto/ChattingType.java b/backend/ddang/src/main/java/com/ddang/ddang/websocket/handler/dto/ChattingType.java
index 92d62a35b..8a8e7a361 100644
--- a/backend/ddang/src/main/java/com/ddang/ddang/websocket/handler/dto/ChattingType.java
+++ b/backend/ddang/src/main/java/com/ddang/ddang/websocket/handler/dto/ChattingType.java
@@ -8,7 +8,7 @@ public enum ChattingType {
     PING("ping"),
     ;
 
-    private String value;
+    private final String value;
 
     ChattingType(final String value) {
         this.value = value;
diff --git a/backend/ddang/src/test/java/com/ddang/ddang/websocket/handler/dto/ChattingTypeTest.java b/backend/ddang/src/test/java/com/ddang/ddang/websocket/handler/dto/ChattingTypeTest.java
index 52604aa02..db0da73ac 100644
--- a/backend/ddang/src/test/java/com/ddang/ddang/websocket/handler/dto/ChattingTypeTest.java
+++ b/backend/ddang/src/test/java/com/ddang/ddang/websocket/handler/dto/ChattingTypeTest.java
@@ -7,6 +7,7 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
+@SuppressWarnings("NonAsciiCharacters")
 class ChattingTypeTest {
 
     @Test