diff --git a/backend/src/main/java/com/votogether/domain/post/entity/Post.java b/backend/src/main/java/com/votogether/domain/post/entity/Post.java
index 5a17fa3ab..16a2f310e 100644
--- a/backend/src/main/java/com/votogether/domain/post/entity/Post.java
+++ b/backend/src/main/java/com/votogether/domain/post/entity/Post.java
@@ -111,6 +111,13 @@ public boolean hasPostOption(final PostOption postOption) {
         return postOptions.contains(postOption);
     }
 
+    public void validateDeadlineNotExceedThreeDays() {
+        LocalDateTime threeDaysFromNow = LocalDateTime.now().plusDays(3);
+        if (this.deadline.isAfter(threeDaysFromNow)) {
+            throw new IllegalStateException("마감 기한은 현재 시간으로부터 3일을 초과할 수 없습니다.");
+        }
+    }
+
     public void validateWriter(final Member member) {
         if (!Objects.equals(this.writer.getId(), member.getId())) {
             throw new BadRequestException(PostExceptionType.NOT_WRITER);
diff --git a/backend/src/main/java/com/votogether/global/jwt/JwtAuthenticationFilter.java b/backend/src/main/java/com/votogether/global/jwt/JwtAuthenticationFilter.java
index 36696793d..4745cdac6 100644
--- a/backend/src/main/java/com/votogether/global/jwt/JwtAuthenticationFilter.java
+++ b/backend/src/main/java/com/votogether/global/jwt/JwtAuthenticationFilter.java
@@ -19,7 +19,8 @@ public class JwtAuthenticationFilter extends OncePerRequestFilter {
             "/health-check",
             "/auth/kakao/callback",
             "/categories/guest",
-            "/swagger-ui.html"
+            "/swagger-ui.html",
+            "/h2-console"
     );
 
     private static final List<String> ALLOWED_START_URIS = List.of(
diff --git a/backend/src/main/resources/application.yml b/backend/src/main/resources/application.yml
index 1c49ccddc..65f0117cc 100644
--- a/backend/src/main/resources/application.yml
+++ b/backend/src/main/resources/application.yml
@@ -13,6 +13,10 @@ spring:
     hibernate:
       ddl-auto: create
 
+  h2:
+    console:
+      enabled: true
+
 logging:
   level:
     org: