diff --git a/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationGetUnreadCountResponse.kt b/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationGetUnreadCountResponse.kt
index d0244f3..eca8f8a 100644
--- a/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationGetUnreadCountResponse.kt
+++ b/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationGetUnreadCountResponse.kt
@@ -4,5 +4,5 @@ import kotlinx.serialization.Serializable
 
 @Serializable
 class NotificationGetUnreadCountResponse {
-    var count: Int? = null
+    var count: Int = -1
 }
diff --git a/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationListNotificationsResponse.kt b/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationListNotificationsResponse.kt
index 765fc5b..a3d7ad8 100644
--- a/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationListNotificationsResponse.kt
+++ b/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationListNotificationsResponse.kt
@@ -6,5 +6,5 @@ import work.socialhub.kbsky.model.bsky.notification.NotificationListNotification
 @Serializable
 class NotificationListNotificationsResponse {
     var cursor: String? = null
-    var notifications: List<NotificationListNotificationsNotification>? = null
+    lateinit var notifications: List<NotificationListNotificationsNotification>
 }
diff --git a/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationUpdateSeenRequest.kt b/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationUpdateSeenRequest.kt
index 6889263..6b388fd 100644
--- a/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationUpdateSeenRequest.kt
+++ b/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/bsky/notification/NotificationUpdateSeenRequest.kt
@@ -1,7 +1,9 @@
 package work.socialhub.kbsky.api.entity.bsky.notification
 
+import kotlinx.datetime.Clock
 import work.socialhub.kbsky.api.entity.share.AuthRequest
 import work.socialhub.kbsky.api.entity.share.MapRequest
+import work.socialhub.kbsky.internal.share._InternalUtility
 
 class NotificationUpdateSeenRequest internal constructor(
     accessJwt: String
@@ -11,11 +13,11 @@ class NotificationUpdateSeenRequest internal constructor(
 
     override fun toMap(): Map<String, Any> {
         return mutableMapOf<String, Any>().also {
-            it.addParam("seenAt", seenAt)
+            it.addParam("seenAt", seenAt())
         }
     }
 
     fun seenAt(): String {
-        return seenAt ?: TODO("seenAt is not set")
+        return seenAt ?: _InternalUtility.dateFormat.format(Clock.System.now())
     }
 }
diff --git a/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/share/AuthRequest.kt b/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/share/AuthRequest.kt
index 5212ba7..fb78e2c 100644
--- a/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/share/AuthRequest.kt
+++ b/core/src/commonMain/kotlin/work/socialhub/kbsky/api/entity/share/AuthRequest.kt
@@ -4,7 +4,6 @@ import kotlinx.serialization.Serializable
 import work.socialhub.kbsky.internal.share._InternalUtility.fromJson
 import kotlin.io.encoding.Base64
 import kotlin.io.encoding.ExperimentalEncodingApi
-import kotlin.properties.Delegates
 
 open class AuthRequest(
     val accessJwt: String
@@ -29,8 +28,8 @@ open class AuthRequest(
         lateinit var scope: String
         lateinit var sub: String
         lateinit var aud: String
-        var iat by Delegates.notNull<Int>()
-        var exp by Delegates.notNull<Int>()
+        var iat: Int = -1
+        var exp: Int = -1
     }
 }
 
diff --git a/core/src/commonMain/kotlin/work/socialhub/kbsky/model/bsky/actor/ActorDefsAdultContentPref.kt b/core/src/commonMain/kotlin/work/socialhub/kbsky/model/bsky/actor/ActorDefsAdultContentPref.kt
index 3a20f5e..53c8257 100644
--- a/core/src/commonMain/kotlin/work/socialhub/kbsky/model/bsky/actor/ActorDefsAdultContentPref.kt
+++ b/core/src/commonMain/kotlin/work/socialhub/kbsky/model/bsky/actor/ActorDefsAdultContentPref.kt
@@ -2,7 +2,6 @@ package work.socialhub.kbsky.model.bsky.actor
 
 import kotlinx.serialization.Serializable
 import work.socialhub.kbsky.BlueskyTypes
-import kotlin.properties.Delegates.notNull
 
 @Serializable
 class ActorDefsAdultContentPref : ActorDefsPreferencesUnion() {
@@ -13,5 +12,5 @@ class ActorDefsAdultContentPref : ActorDefsPreferencesUnion() {
 
     override var type = TYPE
 
-    var enabled by notNull<Boolean>()
+    var enabled: Boolean = false
 }
diff --git a/core/src/commonMain/kotlin/work/socialhub/kbsky/model/bsky/notification/NotificationListNotificationsNotification.kt b/core/src/commonMain/kotlin/work/socialhub/kbsky/model/bsky/notification/NotificationListNotificationsNotification.kt
index 65edace..212f0ac 100644
--- a/core/src/commonMain/kotlin/work/socialhub/kbsky/model/bsky/notification/NotificationListNotificationsNotification.kt
+++ b/core/src/commonMain/kotlin/work/socialhub/kbsky/model/bsky/notification/NotificationListNotificationsNotification.kt
@@ -6,17 +6,20 @@ import work.socialhub.kbsky.model.share.RecordUnion
 
 @Serializable
 class NotificationListNotificationsNotification {
-    var uri: String? = null
-    var cid: String? = null
-    var author: ActorDefsProfileView? = null
+    lateinit var uri: String
+    lateinit var cid: String
+    lateinit var author: ActorDefsProfileView
 
     /**
      * Expected values are 'like', 'repost', 'follow
      * (like, repost, follow, mention, reply, quote)
      */
-    var reason: String? = null
+    lateinit var reason: String
     var reasonSubject: String? = null
-    var record: RecordUnion? = null
-    var isRead: Boolean? = null
-    var indexedAt: String? = null
+
+    lateinit var record: RecordUnion
+    var isRead: Boolean = false
+    lateinit var indexedAt: String
+
+    // TODO: labels
 }
diff --git a/core/src/jvmTest/kotlin/work/socialhub/kbsky/bsky/notification/ListNotificationsTest.kt b/core/src/jvmTest/kotlin/work/socialhub/kbsky/bsky/notification/ListNotificationsTest.kt
index e94eecd..3b71c14 100644
--- a/core/src/jvmTest/kotlin/work/socialhub/kbsky/bsky/notification/ListNotificationsTest.kt
+++ b/core/src/jvmTest/kotlin/work/socialhub/kbsky/bsky/notification/ListNotificationsTest.kt
@@ -17,11 +17,10 @@ class ListNotificationsTest : AbstractTest() {
                 NotificationListNotificationsRequest(accessJwt)
             )
 
-        checkNotNull(response.data.notifications)
-            .forEach { it ->
-                println("|NOTIFICATION|-----------------------------------------")
-                println("REASON> " + it.reason)
-                print(it.record)
-            }
+        response.data.notifications.forEach {
+            println("|NOTIFICATION|-----------------------------------------")
+            println("REASON> " + it.reason)
+            print(it.record)
+        }
     }
 }