diff --git a/notification-domain/src/main/kotlin/io/github/v1servicenotification/detail/spi/PostDetailUserSpi.kt b/notification-domain/src/main/kotlin/io/github/v1servicenotification/detail/spi/PostDetailUserSpi.kt
index ba9dd872..bd4b4eaf 100644
--- a/notification-domain/src/main/kotlin/io/github/v1servicenotification/detail/spi/PostDetailUserSpi.kt
+++ b/notification-domain/src/main/kotlin/io/github/v1servicenotification/detail/spi/PostDetailUserSpi.kt
@@ -3,7 +3,7 @@ package io.github.v1servicenotification.detail.spi
 import java.util.UUID
 
 interface PostDetailUserSpi {
-    fun getExcludeUserIdList(userIdList: List<UUID>): List<UUID>
+    fun getExcludeUserIdList(userIdList: List<UUID>?): List<UUID>
     fun getDeviceToken(userId: UUID): String
     fun getDeviceTokenList(userIdList: List<UUID>): List<String>
 }
diff --git a/notification-domain/src/main/kotlin/io/github/v1servicenotification/stubs/InMemoryUser.kt b/notification-domain/src/main/kotlin/io/github/v1servicenotification/stubs/InMemoryUser.kt
index 944cb54c..7194b507 100644
--- a/notification-domain/src/main/kotlin/io/github/v1servicenotification/stubs/InMemoryUser.kt
+++ b/notification-domain/src/main/kotlin/io/github/v1servicenotification/stubs/InMemoryUser.kt
@@ -11,7 +11,7 @@ class InMemoryUser: PostDetailUserSpi {
         this.userId = userId
     }
 
-    override fun getExcludeUserIdList(userIdList: List<UUID>): List<UUID> {
+    override fun getExcludeUserIdList(userIdList: List<UUID>?): List<UUID> {
         return listOf(userId)
     }
 
diff --git a/notification-infrastructure/src/main/kotlin/io/github/v1servicenotification/domain/user/domain/repository/CustomPostDetailUserImpl.kt b/notification-infrastructure/src/main/kotlin/io/github/v1servicenotification/domain/user/domain/repository/CustomPostDetailUserImpl.kt
index 691ddc6f..16e06e5c 100644
--- a/notification-infrastructure/src/main/kotlin/io/github/v1servicenotification/domain/user/domain/repository/CustomPostDetailUserImpl.kt
+++ b/notification-infrastructure/src/main/kotlin/io/github/v1servicenotification/domain/user/domain/repository/CustomPostDetailUserImpl.kt
@@ -2,6 +2,7 @@ package io.github.v1servicenotification.domain.user.domain.repository
 
 import io.github.v1servicenotification.detail.spi.PostDetailUserSpi
 import io.github.v1servicenotification.infrastructure.feign.client.UserClient
+import io.github.v1servicenotification.infrastructure.feign.client.dto.request.ExcludeUserIdsRequest
 import io.github.v1servicenotification.infrastructure.feign.error.FeignBadRequestException
 import org.springframework.stereotype.Component
 import java.util.UUID
@@ -9,15 +10,16 @@ import java.util.UUID
 @Component
 class CustomPostDetailUserImpl(
     private val userClient: UserClient
-): PostDetailUserSpi {
-    override fun getExcludeUserIdList(userIdList: List<UUID>): List<UUID> {
-        return userClient.getExcludeUserIdList(userIdList).userIdList
+) : PostDetailUserSpi {
+    override fun getExcludeUserIdList(userIdList: List<UUID>?): List<UUID> {
+        val userIdsRequest = ExcludeUserIdsRequest(userIdList)
+        return userClient.getExcludeUserIdList(userIdsRequest).userIdList
     }
 
     override fun getDeviceToken(userId: UUID): String {
         val result = userClient.token(listOf(userId)).tokens
 
-        if(result.isEmpty()) {
+        if (result.isEmpty()) {
             throw FeignBadRequestException.EXCEPTION
         }
         return result[0]
diff --git a/notification-infrastructure/src/main/kotlin/io/github/v1servicenotification/infrastructure/feign/client/UserClient.kt b/notification-infrastructure/src/main/kotlin/io/github/v1servicenotification/infrastructure/feign/client/UserClient.kt
index 9f810c20..aebe76a5 100644
--- a/notification-infrastructure/src/main/kotlin/io/github/v1servicenotification/infrastructure/feign/client/UserClient.kt
+++ b/notification-infrastructure/src/main/kotlin/io/github/v1servicenotification/infrastructure/feign/client/UserClient.kt
@@ -1,9 +1,11 @@
 package io.github.v1servicenotification.infrastructure.feign.client
 
+import io.github.v1servicenotification.infrastructure.feign.client.dto.request.ExcludeUserIdsRequest
 import io.github.v1servicenotification.infrastructure.feign.client.dto.response.TokenResponse
 import io.github.v1servicenotification.infrastructure.feign.client.dto.response.UserIdListResponse
 import org.springframework.cloud.openfeign.FeignClient
 import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RequestBody
 import org.springframework.web.bind.annotation.RequestParam
 import java.util.UUID
 
@@ -14,5 +16,5 @@ interface UserClient {
     fun token(@RequestParam("users") userList: List<UUID>): TokenResponse
 
     @GetMapping("/users/exclude")
-    fun getExcludeUserIdList(@RequestParam("users") userList: List<UUID>): UserIdListResponse
+    fun getExcludeUserIdList(@RequestBody request: ExcludeUserIdsRequest): UserIdListResponse
 }
diff --git a/notification-infrastructure/src/main/kotlin/io/github/v1servicenotification/infrastructure/feign/client/dto/request/ExcludeUserIdsRequest.kt b/notification-infrastructure/src/main/kotlin/io/github/v1servicenotification/infrastructure/feign/client/dto/request/ExcludeUserIdsRequest.kt
new file mode 100644
index 00000000..b8d5b85a
--- /dev/null
+++ b/notification-infrastructure/src/main/kotlin/io/github/v1servicenotification/infrastructure/feign/client/dto/request/ExcludeUserIdsRequest.kt
@@ -0,0 +1,9 @@
+package io.github.v1servicenotification.infrastructure.feign.client.dto.request
+
+import java.util.UUID
+import javax.annotation.Nullable
+
+data class ExcludeUserIdsRequest(
+    @field:Nullable
+    val userIds: List<UUID>?,
+)