diff --git a/src/main/kotlin/dev/usbharu/hideout/Application.kt b/src/main/kotlin/dev/usbharu/hideout/Application.kt
index a582c15c..e5b64c34 100644
--- a/src/main/kotlin/dev/usbharu/hideout/Application.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/Application.kt
@@ -1,5 +1,7 @@
 package dev.usbharu.hideout
 
+import com.fasterxml.jackson.annotation.JsonInclude
+import com.fasterxml.jackson.databind.DeserializationFeature
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import dev.usbharu.hideout.config.Config
 import dev.usbharu.hideout.config.ConfigData
@@ -21,7 +23,7 @@ import io.ktor.server.auth.*
 import io.ktor.util.*
 import org.jetbrains.exposed.sql.Database
 import org.koin.ktor.ext.inject
-import java.util.Base64
+import java.util.*
 
 fun main(args: Array<String>): Unit =
     io.ktor.server.netty.EngineMain.main(args)
@@ -30,19 +32,24 @@ fun main(args: Array<String>): Unit =
 fun Application.module() {
     val module = org.koin.dsl.module {
 
-        single<Database>{ Database.connect(
-            url = "jdbc:h2:./test;MODE=POSTGRESQL",
-            driver = "org.h2.Driver",
-        ) }
-        single<ConfigData>{ ConfigData(
-            environment.config.property("hideout.hostname").getString(),
-            jacksonObjectMapper()
-        ) }
-        single<IUserRepository>{UserRepository(get())}
-        single<IUserAuthRepository>{UserAuthRepository(get())}
-        single<IUserAuthService>{ UserAuthService(get(),get()) }
+        single<Database> {
+            Database.connect(
+                url = "jdbc:h2:./test;MODE=POSTGRESQL",
+                driver = "org.h2.Driver",
+            )
+        }
+        single<ConfigData> {
+            ConfigData(
+                environment.config.property("hideout.hostname").getString(),
+                jacksonObjectMapper().enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY)
+                    .setSerializationInclusion(JsonInclude.Include.NON_EMPTY)
+            )
+        }
+        single<IUserRepository> { UserRepository(get()) }
+        single<IUserAuthRepository> { UserAuthRepository(get()) }
+        single<IUserAuthService> { UserAuthService(get(), get()) }
         single<UserService> { UserService(get()) }
-        single<ActivityPubUserService> { ActivityPubUserService(get())}
+        single<ActivityPubUserService> { ActivityPubUserService(get()) }
     }
     configureKoin(module)
     val configData by inject<ConfigData>()
@@ -59,7 +66,7 @@ fun Application.module() {
     configureSerialization()
     configureSockets()
     val activityPubUserService by inject<ActivityPubUserService>()
-    user(userService,activityPubUserService)
+    user(userService, activityPubUserService)
     login()
     register(userAuthService)
     wellKnown(userService)
diff --git a/src/main/kotlin/dev/usbharu/hideout/ap/Image.kt b/src/main/kotlin/dev/usbharu/hideout/ap/Image.kt
index 481010bb..38d3cbbc 100644
--- a/src/main/kotlin/dev/usbharu/hideout/ap/Image.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/ap/Image.kt
@@ -6,7 +6,7 @@ open class Image : Object {
 
     protected constructor() : super()
     constructor(type: List<String> = emptyList(), name: String, mediaType: String?, url: String?) : super(
-        type,
+        add(type,"Image"),
         name
     ) {
         this.mediaType = mediaType
diff --git a/src/main/kotlin/dev/usbharu/hideout/plugins/ActivityPub.kt b/src/main/kotlin/dev/usbharu/hideout/plugins/ActivityPub.kt
index cf16abd4..2a4ca8db 100644
--- a/src/main/kotlin/dev/usbharu/hideout/plugins/ActivityPub.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/plugins/ActivityPub.kt
@@ -8,7 +8,7 @@ import io.ktor.server.application.*
 import io.ktor.server.response.*
 
 suspend fun <T : JsonLd> ApplicationCall.respondAp(message: T, status: HttpStatusCode = HttpStatusCode.OK) {
-    message.context += "https://www.w3.org/activitystreams"
+    message.context += "https://www.w3.org/ns/activitystreams"
     val activityJson = Config.configData.objectMapper.writeValueAsString(message)
     respondText(activityJson, ContentType.Application.Activity, status)
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/ActivityPubUserService.kt b/src/main/kotlin/dev/usbharu/hideout/service/ActivityPubUserService.kt
index 8e1cc67a..5d301f14 100644
--- a/src/main/kotlin/dev/usbharu/hideout/service/ActivityPubUserService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/service/ActivityPubUserService.kt
@@ -10,7 +10,7 @@ class ActivityPubUserService(private val userService: UserService) {
         val userUrl = "${Config.configData.hostname}/users/$name"
         return Person(
             emptyList(),
-            "Icon",
+            userEntity.name,
             userUrl,
             name,
             userEntity.description,