diff --git a/src/main/kotlin/dev/usbharu/hideout/Application.kt b/src/main/kotlin/dev/usbharu/hideout/Application.kt
index 149a839e..d5ecffdc 100644
--- a/src/main/kotlin/dev/usbharu/hideout/Application.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/Application.kt
@@ -12,6 +12,7 @@ import dev.usbharu.hideout.repository.*
 import dev.usbharu.hideout.routing.register
 import dev.usbharu.hideout.service.IPostService
 import dev.usbharu.hideout.service.IUserAuthService
+import dev.usbharu.hideout.service.IdGenerateService
 import dev.usbharu.hideout.service.TwitterSnowflakeIdGenerateService
 import dev.usbharu.hideout.service.activitypub.*
 import dev.usbharu.hideout.service.impl.PostService
@@ -57,7 +58,7 @@ fun Application.parent() {
             )
         }
 
-        single<IUserRepository> { UserRepository(get()) }
+        single<IUserRepository> { UserRepository(get(),get()) }
         single<IUserAuthService> { UserAuthService(get()) }
         single<HttpSignatureVerifyService> { HttpSignatureVerifyServiceImpl(get()) }
         single<JobQueueParentService> {
@@ -82,7 +83,8 @@ fun Application.parent() {
         single<ActivityPubUserService> { ActivityPubUserServiceImpl(get(), get(), get()) }
         single<ActivityPubNoteService> { ActivityPubNoteServiceImpl(get(), get(), get()) }
         single<IPostService> { PostService(get(), get()) }
-        single<IPostRepository> { PostRepositoryImpl(get(), TwitterSnowflakeIdGenerateService) }
+        single<IPostRepository> { PostRepositoryImpl(get(), get()) }
+        single<IdGenerateService> {TwitterSnowflakeIdGenerateService}
     }
 
 
diff --git a/src/main/kotlin/dev/usbharu/hideout/repository/IUserRepository.kt b/src/main/kotlin/dev/usbharu/hideout/repository/IUserRepository.kt
index c8a0b1a3..58d56ba9 100644
--- a/src/main/kotlin/dev/usbharu/hideout/repository/IUserRepository.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/repository/IUserRepository.kt
@@ -29,4 +29,6 @@ interface IUserRepository {
     suspend fun createFollower(id: Long, follower: Long)
     suspend fun deleteFollower(id: Long, follower: Long)
     suspend fun findFollowersById(id: Long): List<User>
+
+    suspend fun nextId():Long
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/repository/UserRepository.kt b/src/main/kotlin/dev/usbharu/hideout/repository/UserRepository.kt
index f77c17ef..ceb6db1b 100644
--- a/src/main/kotlin/dev/usbharu/hideout/repository/UserRepository.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/repository/UserRepository.kt
@@ -2,6 +2,7 @@ package dev.usbharu.hideout.repository
 
 import dev.usbharu.hideout.domain.model.User
 import dev.usbharu.hideout.domain.model.UsersFollowers
+import dev.usbharu.hideout.service.IdGenerateService
 import kotlinx.coroutines.Dispatchers
 import org.jetbrains.exposed.sql.*
 import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
@@ -9,7 +10,7 @@ import org.jetbrains.exposed.sql.transactions.experimental.newSuspendedTransacti
 import org.jetbrains.exposed.sql.transactions.transaction
 import java.time.Instant
 
-class UserRepository(private val database: Database) : IUserRepository {
+class UserRepository(private val database: Database,private val idGenerateService: IdGenerateService) : IUserRepository {
     init {
         transaction(database) {
             SchemaUtils.create(Users)
@@ -185,6 +186,10 @@ class UserRepository(private val database: Database) : IUserRepository {
             Users.selectAll().limit(limit, offset).map { it.toUser() }
         }
     }
+
+    override suspend fun nextId(): Long {
+        return idGenerateService.generateId()
+    }
 }
 
 object Users : Table("users") {
diff --git a/src/test/kotlin/dev/usbharu/hideout/plugins/KtorKeyMapTest.kt b/src/test/kotlin/dev/usbharu/hideout/plugins/KtorKeyMapTest.kt
index 419a0ae4..08a1bdac 100644
--- a/src/test/kotlin/dev/usbharu/hideout/plugins/KtorKeyMapTest.kt
+++ b/src/test/kotlin/dev/usbharu/hideout/plugins/KtorKeyMapTest.kt
@@ -81,6 +81,10 @@ class KtorKeyMapTest {
                 TODO("Not yet implemented")
             }
 
+            override suspend fun nextId(): Long {
+                TODO("Not yet implemented")
+            }
+
         })
 
         ktorKeyMap.getPrivateKey("test")
diff --git a/src/test/kotlin/dev/usbharu/hideout/repository/UserRepositoryTest.kt b/src/test/kotlin/dev/usbharu/hideout/repository/UserRepositoryTest.kt
index 4ddc8e9c..43dc236e 100644
--- a/src/test/kotlin/dev/usbharu/hideout/repository/UserRepositoryTest.kt
+++ b/src/test/kotlin/dev/usbharu/hideout/repository/UserRepositoryTest.kt
@@ -4,6 +4,7 @@ package dev.usbharu.hideout.repository
 
 import dev.usbharu.hideout.domain.model.User
 import dev.usbharu.hideout.domain.model.UsersFollowers
+import dev.usbharu.hideout.service.IdGenerateService
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.test.runTest
 import org.jetbrains.exposed.sql.Database
@@ -43,7 +44,11 @@ class UserRepositoryTest {
 
     @Test
     fun `findFollowersById フォロワー一覧を取得`() = runTest {
-        val userRepository = UserRepository(db)
+        val userRepository = UserRepository(db, object : IdGenerateService {
+            override suspend fun generateId(): Long {
+                TODO("Not yet implemented")
+            }
+        })
         val user = userRepository.save(
             User(
                 id = 0L,
@@ -99,7 +104,11 @@ class UserRepositoryTest {
 
     @Test
     fun `createFollower フォロワー追加`() = runTest {
-        val userRepository = UserRepository(db)
+        val userRepository = UserRepository(db, object : IdGenerateService {
+            override suspend fun generateId(): Long {
+                TODO("Not yet implemented")
+            }
+        })
         val user = userRepository.save(
             User(0L,
                 "test",