diff --git a/build.gradle b/build.gradle
index 467d706..46758a7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -46,7 +46,8 @@ dependencies {
 
 	// fcm
 	implementation 'com.google.firebase:firebase-admin:9.2.0'
-	implementation group: 'com.squareup.okhttp3', name: 'okhttp', version: '4.2.2'
+	implementation 'com.squareup.okhttp3:okhttp:4.9.3'
+	implementation 'com.squareup.okio:okio:2.10.0' // 최신버전
 
 	// Scheduling
 	implementation 'org.springframework.boot:spring-boot-starter-scheduling'
diff --git a/src/main/java/reborn/backend/board/domain/Board.java b/src/main/java/reborn/backend/board/domain/Board.java
index 33b0752..7446c46 100644
--- a/src/main/java/reborn/backend/board/domain/Board.java
+++ b/src/main/java/reborn/backend/board/domain/Board.java
@@ -26,7 +26,7 @@ public class Board extends BaseEntity {
     private Long id;
 
     @Enumerated(EnumType.STRING)
-    @Column(length = 45, columnDefinition = "varchar(45) default 'ACTIVE'")
+    @Column(length = 45, columnDefinition = "varchar(45) default 'ACTIVE'", nullable = false)
     private BoardType boardType;
 
     @ManyToOne(fetch = FetchType.LAZY)