diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Accept.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Accept.kt
index 15eaf20f..93ded2d2 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Accept.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Accept.kt
@@ -1,6 +1,7 @@
 package dev.usbharu.hideout.activitypub.domain.model
 
 import com.fasterxml.jackson.annotation.JsonCreator
+import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 import dev.usbharu.hideout.activitypub.domain.model.objects.ObjectDeserializer
@@ -8,13 +9,13 @@ import dev.usbharu.hideout.activitypub.domain.model.objects.ObjectDeserializer
 open class Accept @JsonCreator constructor(
     type: List<String> = emptyList(),
     override val name: String,
-    @JsonDeserialize(using = ObjectDeserializer::class) @Suppress("VariableNaming") var `object`: Object?,
+    @JsonDeserialize(using = ObjectDeserializer::class)
+    @JsonProperty("object")
+    val apObject: Object,
     override val actor: String
 ) : Object(
     type = add(type, "Accept")
-),
-    HasActor,
-    HasName {
+), HasActor, HasName {
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
@@ -23,22 +24,27 @@ open class Accept @JsonCreator constructor(
 
         other as Accept
 
-        if (`object` != other.`object`) return false
-        if (actor != other.actor) return false
         if (name != other.name) return false
+        if (apObject != other.apObject) return false
+        if (actor != other.actor) return false
 
         return true
     }
 
     override fun hashCode(): Int {
         var result = super.hashCode()
-        result = 31 * result + (`object`?.hashCode() ?: 0)
-        result = 31 * result + actor.hashCode()
         result = 31 * result + name.hashCode()
+        result = 31 * result + apObject.hashCode()
+        result = 31 * result + actor.hashCode()
         return result
     }
 
     override fun toString(): String {
-        return "Accept(" + "`object`=$`object`, " + "actor='$actor', " + "name='$name'" + ")" + " ${super.toString()}"
+        return "Accept(" +
+                "name='$name', " +
+                "apObject=$apObject, " +
+                "actor='$actor'" +
+                ")" +
+                " ${super.toString()}"
     }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Create.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Create.kt
index 6b6bb810..3353ea3c 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Create.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Create.kt
@@ -1,5 +1,6 @@
 package dev.usbharu.hideout.activitypub.domain.model
 
+import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 import dev.usbharu.hideout.activitypub.domain.model.objects.ObjectDeserializer
@@ -8,8 +9,8 @@ open class Create(
     type: List<String> = emptyList(),
     override val name: String,
     @JsonDeserialize(using = ObjectDeserializer::class)
-    @Suppress("VariableNaming")
-    val `object`: Object,
+    @JsonProperty("object")
+    val apObject: Object,
     override val actor: String,
     override val id: String,
     val to: List<String> = emptyList(),
@@ -28,27 +29,36 @@ open class Create(
 
         other as Create
 
-        if (`object` != other.`object`) return false
-        if (to != other.to) return false
-        if (cc != other.cc) return false
         if (name != other.name) return false
+        if (apObject != other.apObject) return false
         if (actor != other.actor) return false
         if (id != other.id) return false
+        if (to != other.to) return false
+        if (cc != other.cc) return false
 
         return true
     }
 
     override fun hashCode(): Int {
         var result = super.hashCode()
-        result = 31 * result + (`object`?.hashCode() ?: 0)
-        result = 31 * result + to.hashCode()
-        result = 31 * result + cc.hashCode()
         result = 31 * result + name.hashCode()
+        result = 31 * result + apObject.hashCode()
         result = 31 * result + actor.hashCode()
         result = 31 * result + id.hashCode()
+        result = 31 * result + to.hashCode()
+        result = 31 * result + cc.hashCode()
         return result
     }
 
-    override fun toString(): String =
-        "Create(`object`=$`object`, to=$to, cc=$cc, name='$name', actor='$actor', id='$id') ${super.toString()}"
+    override fun toString(): String {
+        return "Create(" +
+                "name='$name', " +
+                "apObject=$apObject, " +
+                "actor='$actor', " +
+                "id='$id', " +
+                "to=$to, " +
+                "cc=$cc" +
+                ")" +
+                " ${super.toString()}"
+    }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Delete.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Delete.kt
index e4e8ccb0..f2142722 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Delete.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Delete.kt
@@ -1,13 +1,14 @@
 package dev.usbharu.hideout.activitypub.domain.model
 
+import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 import dev.usbharu.hideout.activitypub.domain.model.objects.ObjectDeserializer
 
 open class Delete : Object, HasId, HasActor {
     @JsonDeserialize(using = ObjectDeserializer::class)
-    @Suppress("VariableNaming")
-    val `object`: Object
+    @JsonProperty("object")
+    val apObject: Object
     val published: String
     override val actor: String
     override val id: String
@@ -19,7 +20,7 @@ open class Delete : Object, HasId, HasActor {
         `object`: Object,
         published: String
     ) : super(add(type, "Delete")) {
-        this.`object` = `object`
+        this.apObject = `object`
         this.published = published
         this.actor = actor
         this.id = id
@@ -32,7 +33,7 @@ open class Delete : Object, HasId, HasActor {
 
         other as Delete
 
-        if (`object` != other.`object`) return false
+        if (apObject != other.apObject) return false
         if (published != other.published) return false
         if (actor != other.actor) return false
         if (id != other.id) return false
@@ -42,7 +43,7 @@ open class Delete : Object, HasId, HasActor {
 
     override fun hashCode(): Int {
         var result = super.hashCode()
-        result = 31 * result + (`object`?.hashCode() ?: 0)
+        result = 31 * result + (apObject?.hashCode() ?: 0)
         result = 31 * result + (published?.hashCode() ?: 0)
         result = 31 * result + actor.hashCode()
         result = 31 * result + id.hashCode()
@@ -50,5 +51,5 @@ open class Delete : Object, HasId, HasActor {
     }
 
     override fun toString(): String =
-        "Delete(`object`=$`object`, published=$published, actor='$actor', id='$id') ${super.toString()}"
+        "Delete(`object`=$apObject, published=$published, actor='$actor', id='$id') ${super.toString()}"
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Follow.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Follow.kt
index d4ef2c95..c7f292ba 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Follow.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Follow.kt
@@ -1,10 +1,11 @@
 package dev.usbharu.hideout.activitypub.domain.model
 
+import com.fasterxml.jackson.annotation.JsonProperty
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 
 open class Follow(
     type: List<String> = emptyList(),
-    @Suppress("VariableNaming") val `object`: String,
+    @JsonProperty("object") val apObject: String,
     override val actor: String
 ) : Object(
     type = add(type, "Follow")
@@ -18,7 +19,7 @@ open class Follow(
 
         other as Follow
 
-        if (`object` != other.`object`) return false
+        if (apObject != other.apObject) return false
         if (actor != other.actor) return false
 
         return true
@@ -26,10 +27,10 @@ open class Follow(
 
     override fun hashCode(): Int {
         var result = super.hashCode()
-        result = 31 * result + `object`.hashCode()
+        result = 31 * result + apObject.hashCode()
         result = 31 * result + actor.hashCode()
         return result
     }
 
-    override fun toString(): String = "Follow(`object`=$`object`, actor='$actor') ${super.toString()}"
+    override fun toString(): String = "Follow(`object`=$apObject, actor='$actor') ${super.toString()}"
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Like.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Like.kt
index f4eaa13f..39ef65a2 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Like.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Like.kt
@@ -1,5 +1,6 @@
 package dev.usbharu.hideout.activitypub.domain.model
 
+import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 import dev.usbharu.hideout.activitypub.domain.model.objects.ObjectDeserializer
@@ -8,7 +9,7 @@ open class Like(
     type: List<String> = emptyList(),
     override val actor: String,
     override val id: String,
-    @Suppress("VariableNaming") val `object`: String,
+    @JsonProperty("object") val apObject: String,
     val content: String,
     @JsonDeserialize(contentUsing = ObjectDeserializer::class) val tag: List<Object> = emptyList()
 ) : Object(
@@ -24,26 +25,33 @@ open class Like(
 
         other as Like
 
-        if (`object` != other.`object`) return false
-        if (content != other.content) return false
-        if (tag != other.tag) return false
         if (actor != other.actor) return false
         if (id != other.id) return false
+        if (apObject != other.apObject) return false
+        if (content != other.content) return false
+        if (tag != other.tag) return false
 
         return true
     }
 
     override fun hashCode(): Int {
         var result = super.hashCode()
-        result = 31 * result + (`object`?.hashCode() ?: 0)
-        result = 31 * result + (content?.hashCode() ?: 0)
-        result = 31 * result + tag.hashCode()
         result = 31 * result + actor.hashCode()
         result = 31 * result + id.hashCode()
+        result = 31 * result + apObject.hashCode()
+        result = 31 * result + content.hashCode()
+        result = 31 * result + tag.hashCode()
         return result
     }
 
     override fun toString(): String {
-        return "Like(`object`=$`object`, content=$content, tag=$tag, actor='$actor', id='$id') ${super.toString()}"
+        return "Like(" +
+                "actor='$actor', " +
+                "id='$id', " +
+                "apObject='$apObject', " +
+                "content='$content', " +
+                "tag=$tag" +
+                ")" +
+                " ${super.toString()}"
     }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/accept/ApAcceptProcessor.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/accept/ApAcceptProcessor.kt
index 0567bf5f..68538572 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/accept/ApAcceptProcessor.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/accept/ApAcceptProcessor.kt
@@ -20,7 +20,7 @@ class ApAcceptProcessor(
     AbstractActivityPubProcessor<Accept>(transaction) {
 
     override suspend fun internalProcess(activity: ActivityPubProcessContext<Accept>) {
-        val value = activity.activity.`object` ?: throw IllegalActivityPubObjectException("object is null")
+        val value = activity.activity.apObject ?: throw IllegalActivityPubObjectException("object is null")
 
         if (value.type.contains("Follow").not()) {
             logger.warn("FAILED Activity type isn't Follow.")
@@ -29,7 +29,7 @@ class ApAcceptProcessor(
 
         val follow = value as Follow
 
-        val userUrl = follow.`object`
+        val userUrl = follow.apObject
         val followerUrl = follow.actor
 
         val user = userQueryService.findByUrl(userUrl)
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/create/ApSendCreateServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/create/ApSendCreateServiceImpl.kt
index 0d3eeac8..226f2a63 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/create/ApSendCreateServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/create/ApSendCreateServiceImpl.kt
@@ -33,7 +33,7 @@ class ApSendCreateServiceImpl(
         val note = noteQueryService.findById(post.id).first
         val create = Create(
             name = "Create Note",
-            `object` = note,
+            apObject = note,
             actor = note.attributedTo,
             id = "${applicationConfig.url}/create/note/${post.id}"
         )
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/create/CreateActivityProcessor.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/create/CreateActivityProcessor.kt
index 2e1b557c..827042ef 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/create/CreateActivityProcessor.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/create/CreateActivityProcessor.kt
@@ -13,7 +13,7 @@ import org.springframework.stereotype.Service
 class CreateActivityProcessor(transaction: Transaction, private val apNoteService: APNoteService) :
     AbstractActivityPubProcessor<Create>(transaction) {
     override suspend fun internalProcess(activity: ActivityPubProcessContext<Create>) {
-        apNoteService.fetchNote(activity.activity.`object` as Note)
+        apNoteService.fetchNote(activity.activity.apObject as Note)
     }
 
     override fun isSupported(activityType: ActivityType): Boolean = activityType == ActivityType.Create
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/delete/APDeleteProcessor.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/delete/APDeleteProcessor.kt
index f6f136fa..99f4b159 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/delete/APDeleteProcessor.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/delete/APDeleteProcessor.kt
@@ -18,7 +18,7 @@ class APDeleteProcessor(
 ) :
     AbstractActivityPubProcessor<Delete>(transaction) {
     override suspend fun internalProcess(activity: ActivityPubProcessContext<Delete>) {
-        val value = activity.activity.`object`
+        val value = activity.activity.apObject
         if (value !is HasId) {
             throw IllegalActivityPubObjectException("object hasn't id")
         }
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APFollowProcessor.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APFollowProcessor.kt
index b56cd49f..847f4609 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APFollowProcessor.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APFollowProcessor.kt
@@ -17,13 +17,13 @@ class APFollowProcessor(
 ) :
     AbstractActivityPubProcessor<Follow>(transaction) {
     override suspend fun internalProcess(activity: ActivityPubProcessContext<Follow>) {
-        logger.info("FOLLOW from: {} to {}", activity.activity.actor, activity.activity.`object`)
+        logger.info("FOLLOW from: {} to {}", activity.activity.actor, activity.activity.apObject)
 
         // inboxをジョブキューに乗せているので既に不要だが、フォロー承認制アカウントを実装する際に必要なので残す
         val jobProps = ReceiveFollowJobParam(
             activity.activity.actor,
             objectMapper.writeValueAsString(activity.activity),
-            activity.activity.`object`
+            activity.activity.apObject
         )
         jobQueueParentService.scheduleTypeSafe(ReceiveFollowJob, jobProps)
     }
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APReceiveFollowJobProcessor.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APReceiveFollowJobProcessor.kt
index f8cf8556..0c3957b1 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APReceiveFollowJobProcessor.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APReceiveFollowJobProcessor.kt
@@ -39,7 +39,7 @@ class APReceiveFollowJobProcessor(
             url = urlString,
             body = Accept(
                 name = "Follow",
-                `object` = follow,
+                apObject = follow,
                 actor = param.targetActor
             ),
             signer = signer
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APReceiveFollowService.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APReceiveFollowService.kt
index 2011fce1..01d85a8b 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APReceiveFollowService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APReceiveFollowService.kt
@@ -18,11 +18,11 @@ class APReceiveFollowServiceImpl(
     @Qualifier("activitypub") private val objectMapper: ObjectMapper
 ) : APReceiveFollowService {
     override suspend fun receiveFollow(follow: Follow) {
-        logger.info("FOLLOW from: {} to: {}", follow.actor, follow.`object`)
+        logger.info("FOLLOW from: {} to: {}", follow.actor, follow.apObject)
         jobQueueParentService.schedule(ReceiveFollowJob) {
             props[ReceiveFollowJob.actor] = follow.actor
             props[ReceiveFollowJob.follow] = objectMapper.writeValueAsString(follow)
-            props[ReceiveFollowJob.targetActor] = follow.`object`
+            props[ReceiveFollowJob.targetActor] = follow.apObject
         }
         return
     }
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APSendFollowService.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APSendFollowService.kt
index 554fa571..825ec198 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APSendFollowService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APSendFollowService.kt
@@ -15,7 +15,7 @@ class APSendFollowServiceImpl(
 ) : APSendFollowService {
     override suspend fun sendFollow(sendFollowDto: SendFollowDto) {
         val follow = Follow(
-            `object` = sendFollowDto.followTargetUserId.url,
+            apObject = sendFollowDto.followTargetUserId.url,
             actor = sendFollowDto.userId.url
         )
 
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/like/APLikeProcessor.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/like/APLikeProcessor.kt
index 9d56fe94..8938f017 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/like/APLikeProcessor.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/like/APLikeProcessor.kt
@@ -23,7 +23,7 @@ class APLikeProcessor(
         val actor = activity.activity.actor
         val content = activity.activity.content
 
-        val target = activity.activity.`object`
+        val target = activity.activity.apObject
 
         val personWithEntity = apUserService.fetchPersonWithEntity(actor)
 
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/like/ApReactionJobProcessor.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/like/ApReactionJobProcessor.kt
index 3f73bb2e..1fee5eda 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/like/ApReactionJobProcessor.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/like/ApReactionJobProcessor.kt
@@ -22,7 +22,7 @@ class ApReactionJobProcessor(
             param.inbox,
             Like(
                 actor = param.actor,
-                `object` = param.postUrl,
+                apObject = param.postUrl,
                 id = "${applicationConfig.url}/liek/note/${param.id}",
                 content = param.reaction
             ),
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/undo/APUndoProcessor.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/undo/APUndoProcessor.kt
index 99bd9ba1..16419348 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/undo/APUndoProcessor.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/activity/undo/APUndoProcessor.kt
@@ -32,12 +32,12 @@ class APUndoProcessor(
             "Follow" -> {
                 val follow = undo.`object` as Follow
 
-                if (follow.`object` == null) {
+                if (follow.apObject == null) {
                     return
                 }
-                apUserService.fetchPerson(undo.actor, follow.`object`)
+                apUserService.fetchPerson(undo.actor, follow.apObject)
                 val follower = userQueryService.findByUrl(undo.actor)
-                val target = userQueryService.findByUrl(follow.`object`)
+                val target = userQueryService.findByUrl(follow.apObject)
                 userService.unfollow(target.id, follower.id)
                 return
             }
diff --git a/src/test/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APSendFollowServiceImplTest.kt b/src/test/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APSendFollowServiceImplTest.kt
index 93e1d76d..0fe5f689 100644
--- a/src/test/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APSendFollowServiceImplTest.kt
+++ b/src/test/kotlin/dev/usbharu/hideout/activitypub/service/activity/follow/APSendFollowServiceImplTest.kt
@@ -24,7 +24,7 @@ class APSendFollowServiceImplTest {
         apSendFollowServiceImpl.sendFollow(sendFollowDto)
 
         val value = Follow(
-            `object` = sendFollowDto.followTargetUserId.url,
+            apObject = sendFollowDto.followTargetUserId.url,
             actor = sendFollowDto.userId.url
         )
         verify(apRequestService, times(1)).apPost(
diff --git a/src/test/kotlin/dev/usbharu/hideout/activitypub/service/common/APRequestServiceImplTest.kt b/src/test/kotlin/dev/usbharu/hideout/activitypub/service/common/APRequestServiceImplTest.kt
index 2c609183..2bb41d56 100644
--- a/src/test/kotlin/dev/usbharu/hideout/activitypub/service/common/APRequestServiceImplTest.kt
+++ b/src/test/kotlin/dev/usbharu/hideout/activitypub/service/common/APRequestServiceImplTest.kt
@@ -47,7 +47,7 @@ class APRequestServiceImplTest {
         )
 
         val responseClass = Follow(
-            `object` = "https://example.com",
+            apObject = "https://example.com",
             actor = "https://example.com"
         )
         apRequestServiceImpl.apGet("https://example.com", responseClass = responseClass::class.java)
@@ -72,7 +72,7 @@ class APRequestServiceImplTest {
         )
 
         val responseClass = Follow(
-            `object` = "https://example.com",
+            apObject = "https://example.com",
             actor = "https://example.com"
         )
         apRequestServiceImpl.apGet(
@@ -112,7 +112,7 @@ class APRequestServiceImplTest {
         )
 
         val responseClass = Follow(
-            `object` = "https://example.com",
+            apObject = "https://example.com",
             actor = "https://example.com"
         )
         apRequestServiceImpl.apGet(
@@ -163,7 +163,7 @@ class APRequestServiceImplTest {
         }), objectMapper, mock(), dateTimeFormatter)
 
         val body = Follow(
-            `object` = "https://example.com",
+            apObject = "https://example.com",
             actor = "https://example.com"
         )
         apRequestServiceImpl.apPost("https://example.com", body, null)
@@ -209,7 +209,7 @@ class APRequestServiceImplTest {
         }), objectMapper, mock(), dateTimeFormatter)
 
         val body = Follow(
-            `object` = "https://example.com",
+            apObject = "https://example.com",
             actor = "https://example.com"
         )
         apRequestServiceImpl.apPost("https://example.com", body, null)
@@ -239,7 +239,7 @@ class APRequestServiceImplTest {
         }), objectMapper, mock(), dateTimeFormatter)
 
         val body = Follow(
-            `object` = "https://example.com",
+            apObject = "https://example.com",
             actor = "https://example.com"
         )
         apRequestServiceImpl.apPost("https://example.com", body, UserBuilder.remoteUserOf())
@@ -280,7 +280,7 @@ class APRequestServiceImplTest {
         }), objectMapper, httpSignatureSigner, dateTimeFormatter)
 
         val body = Follow(
-            `object` = "https://example.com",
+            apObject = "https://example.com",
             actor = "https://example.com"
         )
         apRequestServiceImpl.apPost(
@@ -330,7 +330,7 @@ class APRequestServiceImplTest {
         }), objectMapper, mock(), dateTimeFormatter)
 
         val body = Follow(
-            `object` = "https://example.com",
+            apObject = "https://example.com",
             actor = "https://example.com"
         )
         val actual = apRequestServiceImpl.apPost("https://example.com", body, null, body::class.java)
diff --git a/src/test/kotlin/dev/usbharu/hideout/ap/ContextSerializerTest.kt b/src/test/kotlin/dev/usbharu/hideout/ap/ContextSerializerTest.kt
index d73e31d7..a141c11b 100644
--- a/src/test/kotlin/dev/usbharu/hideout/ap/ContextSerializerTest.kt
+++ b/src/test/kotlin/dev/usbharu/hideout/ap/ContextSerializerTest.kt
@@ -12,8 +12,8 @@ class ContextSerializerTest {
         val accept = Accept(
             name = "aaa",
             actor = "bbb",
-            `object` = Follow(
-                `object` = "ddd",
+            apObject = Follow(
+                apObject = "ddd",
                 actor = "aaa"
             )
         )