diff --git a/app/src/main/java/org/sopt/and/data/remote/source/UserDataSource.kt b/app/src/main/java/org/sopt/and/data/remote/source/UserDataSource.kt
index c6c6bed..95d4cf3 100644
--- a/app/src/main/java/org/sopt/and/data/remote/source/UserDataSource.kt
+++ b/app/src/main/java/org/sopt/and/data/remote/source/UserDataSource.kt
@@ -1,9 +1,9 @@
 package org.sopt.and.data.remote.source
 
-import org.sopt.and.base.BaseResponse
+import org.sopt.and.base.NullableBaseResponse
 import org.sopt.and.data.model.request.UserRegisterRequestDto
 import org.sopt.and.data.model.response.UserRegisterResponse
 
 interface UserDataSource {
-    suspend fun registerUser(userRegisterRequestDto: UserRegisterRequestDto): BaseResponse<UserRegisterResponse>
+    suspend fun registerUser(userRegisterRequestDto: UserRegisterRequestDto): NullableBaseResponse<UserRegisterResponse>
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/sopt/and/data/remote/source/UserDataSourceImpl.kt b/app/src/main/java/org/sopt/and/data/remote/source/UserDataSourceImpl.kt
index 2882e6a..65bdf52 100644
--- a/app/src/main/java/org/sopt/and/data/remote/source/UserDataSourceImpl.kt
+++ b/app/src/main/java/org/sopt/and/data/remote/source/UserDataSourceImpl.kt
@@ -1,6 +1,6 @@
 package org.sopt.and.data.remote.source
 
-import org.sopt.and.base.BaseResponse
+import org.sopt.and.base.NullableBaseResponse
 import org.sopt.and.data.model.request.UserRegisterRequestDto
 import org.sopt.and.data.model.response.UserRegisterResponse
 import org.sopt.and.data.service.UserApi
@@ -10,6 +10,6 @@ class UserDataSourceImpl @Inject constructor(
     private val userApi: UserApi
 ) : UserDataSource {
     override suspend fun registerUser(
-        userRegisterRequestDto: UserRegisterRequestDto): BaseResponse<UserRegisterResponse> =
+        userRegisterRequestDto: UserRegisterRequestDto): NullableBaseResponse<UserRegisterResponse> =
         userApi.registerUser(userRegisterRequestDto)
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/sopt/and/data/service/UserApi.kt b/app/src/main/java/org/sopt/and/data/service/UserApi.kt
index c2d2fc8..07175c7 100644
--- a/app/src/main/java/org/sopt/and/data/service/UserApi.kt
+++ b/app/src/main/java/org/sopt/and/data/service/UserApi.kt
@@ -1,6 +1,6 @@
 package org.sopt.and.data.service
 
-import org.sopt.and.base.BaseResponse
+import org.sopt.and.base.NullableBaseResponse
 import org.sopt.and.data.model.request.UserRegisterRequestDto
 import org.sopt.and.data.model.response.UserRegisterResponse
 import retrofit2.http.Body
@@ -13,7 +13,7 @@ interface UserApi {
     @POST("/user")
     suspend fun registerUser(
         @Body body: UserRegisterRequestDto
-    ) : BaseResponse<UserRegisterResponse>
+    ) : NullableBaseResponse<UserRegisterResponse>
 
     @POST("/login")
     suspend fun login(