diff --git a/tgbotapi.core/api/tgbotapi.core.api b/tgbotapi.core/api/tgbotapi.core.api
index b7cdca387c..cf5f6aaa01 100644
--- a/tgbotapi.core/api/tgbotapi.core.api
+++ b/tgbotapi.core/api/tgbotapi.core.api
@@ -9403,16 +9403,22 @@ public final class dev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationCha
 
 public final class dev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged$Disabled : dev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged {
 	public static final field INSTANCE Ldev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged$Disabled;
+	public fun equals (Ljava/lang/Object;)Z
 	public fun getCost ()Ljava/lang/Integer;
 	public fun getEnabled ()Z
+	public fun hashCode ()I
 	public final fun serializer ()Lkotlinx/serialization/KSerializer;
+	public fun toString ()Ljava/lang/String;
 }
 
 public final class dev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged$Free : dev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged {
 	public static final field INSTANCE Ldev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged$Free;
+	public fun equals (Ljava/lang/Object;)Z
 	public fun getCost ()Ljava/lang/Integer;
 	public fun getEnabled ()Z
+	public fun hashCode ()I
 	public final fun serializer ()Lkotlinx/serialization/KSerializer;
+	public fun toString ()Ljava/lang/String;
 }
 
 public final class dev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged$Paid : dev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged {
@@ -9428,16 +9434,6 @@ public final class dev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationCha
 	public fun toString ()Ljava/lang/String;
 }
 
-public synthetic class dev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged$Paid$$serializer : kotlinx/serialization/internal/GeneratedSerializer {
-	public static final field INSTANCE Ldev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged$Paid$$serializer;
-	public final fun childSerializers ()[Lkotlinx/serialization/KSerializer;
-	public final fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ldev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged$Paid;
-	public synthetic fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ljava/lang/Object;
-	public final fun getDescriptor ()Lkotlinx/serialization/descriptors/SerialDescriptor;
-	public final fun serialize (Lkotlinx/serialization/encoding/Encoder;Ldev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged$Paid;)V
-	public synthetic fun serialize (Lkotlinx/serialization/encoding/Encoder;Ljava/lang/Object;)V
-}
-
 public final class dev/inmo/tgbotapi/types/ChannelDirectMessagesConfigurationChanged$Paid$Companion {
 	public final fun serializer ()Lkotlinx/serialization/KSerializer;
 }
@@ -17849,16 +17845,6 @@ public final class dev/inmo/tgbotapi/types/checklists/Checklist$Input : dev/inmo
 	public fun toString ()Ljava/lang/String;
 }
 
-public synthetic class dev/inmo/tgbotapi/types/checklists/Checklist$Input$$serializer : kotlinx/serialization/internal/GeneratedSerializer {
-	public static final field INSTANCE Ldev/inmo/tgbotapi/types/checklists/Checklist$Input$$serializer;
-	public final fun childSerializers ()[Lkotlinx/serialization/KSerializer;
-	public final fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ldev/inmo/tgbotapi/types/checklists/Checklist$Input;
-	public synthetic fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ljava/lang/Object;
-	public final fun getDescriptor ()Lkotlinx/serialization/descriptors/SerialDescriptor;
-	public final fun serialize (Lkotlinx/serialization/encoding/Encoder;Ldev/inmo/tgbotapi/types/checklists/Checklist$Input;)V
-	public synthetic fun serialize (Lkotlinx/serialization/encoding/Encoder;Ljava/lang/Object;)V
-}
-
 public final class dev/inmo/tgbotapi/types/checklists/Checklist$Input$Companion : kotlinx/serialization/KSerializer {
 	public fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ldev/inmo/tgbotapi/types/checklists/Checklist$Input;
 	public synthetic fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ljava/lang/Object;
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/DirectMessagePriceChanged.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/DirectMessagePriceChanged.kt
index 403f9a72c4..ebcb8eb5fb 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/DirectMessagePriceChanged.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/DirectMessagePriceChanged.kt
@@ -7,25 +7,26 @@ import kotlinx.serialization.descriptors.SerialDescriptor
 import kotlinx.serialization.encoding.Decoder
 import kotlinx.serialization.encoding.Encoder
 
-@Serializable
+@Suppress("SERIALIZER_TYPE_INCOMPATIBLE")
+@Serializable(ChannelDirectMessagesConfigurationChanged.Companion::class)
 sealed interface ChannelDirectMessagesConfigurationChanged : ChannelEvent {
     val enabled: Boolean
     val cost: Int?
-    @Serializable
-    object Disabled : ChannelDirectMessagesConfigurationChanged {
+    @Serializable(ChannelDirectMessagesConfigurationChanged.Companion::class)
+    data object Disabled : ChannelDirectMessagesConfigurationChanged {
         override val enabled: Boolean
             get() = false
         override val cost: Int?
             get() = null
     }
-    @Serializable
-    object Free : ChannelDirectMessagesConfigurationChanged {
+    @Serializable(ChannelDirectMessagesConfigurationChanged.Companion::class)
+    data object Free : ChannelDirectMessagesConfigurationChanged {
         override val enabled: Boolean
             get() = true
         override val cost: Int
             get() = 0
     }
-    @Serializable
+    @Serializable(ChannelDirectMessagesConfigurationChanged.Companion::class)
     data class Paid(
         override val cost: Int
     ) : ChannelDirectMessagesConfigurationChanged {
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/checklists/Checklist.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/checklists/Checklist.kt
index e85509049b..9a48e7f329 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/checklists/Checklist.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/checklists/Checklist.kt
@@ -30,7 +30,7 @@ sealed interface Checklist : TitledInput {
     val tasks: List<ChecklistTask>
     val othersCanAddTasks: Boolean
     val othersCanCompleteTasks: Boolean
-    @Serializable
+    @Serializable(Input.Companion::class)
     data class Input @Warning("It is low level API. Do not use it without need") constructor(
         @SerialName(titleField)
         override val title: String,