diff --git a/CHANGELOG.md b/CHANGELOG.md
index 084f9d3807..abcea7f75e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,8 @@
     `keyboard`
     * `makeLinkToMessage` now is not `PreviewFeature`
     * All deprecations was removed
+    * `RequestException` now extends `io.ktor.utils.io.errors.IOException` instead of `kotlinx.io.IOException`
+    * `Any#toJson` now is NOT `inline`
 
 ## 0.24.0
 
diff --git a/TelegramBotAPI/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatIdentifier.kt b/TelegramBotAPI/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatIdentifier.kt
index a871bceaa3..603eb5e838 100644
--- a/TelegramBotAPI/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatIdentifier.kt
+++ b/TelegramBotAPI/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatIdentifier.kt
@@ -1,6 +1,7 @@
 package com.github.insanusmokrassar.TelegramBotAPI.types
 
 import kotlinx.serialization.*
+import kotlinx.serialization.json.JsonPrimitiveSerializer
 
 @Serializable(ChatIdentifierSerializer::class)
 sealed class ChatIdentifier
@@ -39,13 +40,15 @@ fun String.toUsername(): Username = Username(this)
 @Serializer(ChatIdentifier::class)
 internal object ChatIdentifierSerializer : KSerializer<ChatIdentifier> {
     override fun deserialize(decoder: Decoder): ChatIdentifier {
-        val id = decoder.decodeString()
-        return id.toLongOrNull() ?.let {
+        val id = JsonPrimitiveSerializer.deserialize(decoder)
+        return id.longOrNull ?.let {
             ChatId(it)
-        } ?: if (!id.startsWith("@")) {
-            Username("@$id")
-        } else {
-            Username(id)
+        } ?: id.content.let {
+            if (!it.startsWith("@")) {
+                Username("@$it")
+            } else {
+                Username(it)
+            }
         }
     }
 
diff --git a/TelegramBotAPI/src/commonTest/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatIdentifierTests.kt b/TelegramBotAPI/src/commonTest/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatIdentifierTests.kt
index a11c7a22ed..02005ee51c 100644
--- a/TelegramBotAPI/src/commonTest/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatIdentifierTests.kt
+++ b/TelegramBotAPI/src/commonTest/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatIdentifierTests.kt
@@ -1,10 +1,8 @@
 package com.github.insanusmokrassar.TelegramBotAPI.types
 
-import com.github.insanusmokrassar.TelegramBotAPI.NonstrictTestsJsonFormat
 import com.github.insanusmokrassar.TelegramBotAPI.TestsJsonFormat
 import kotlinx.serialization.ImplicitReflectionSerializer
 import kotlinx.serialization.Serializable
-import kotlinx.serialization.json.Json
 import kotlin.test.*
 
 @ImplicitReflectionSerializer
@@ -56,25 +54,25 @@ class ChatIdentifierTests {
         )
 
         Example(chatIdentifierChatId.toChatId()).let { withChatId ->
-            val stringified = NonstrictTestsJsonFormat.stringify(Example.serializer(), withChatId)
+            val stringified = TestsJsonFormat.stringify(Example.serializer(), withChatId)
             assertEquals(stringified, "{\"identifier\":$chatIdentifierChatId}")
-            val deserialized = NonstrictTestsJsonFormat.parse(Example.serializer(), stringified)
+            val deserialized = TestsJsonFormat.parse(Example.serializer(), stringified)
             assertEquals(withChatId, deserialized)
         }
 
         Example(testUsername.toUsername()).let { withUsername ->
-            val stringified = NonstrictTestsJsonFormat.stringify(Example.serializer(), withUsername)
+            val stringified = TestsJsonFormat.stringify(Example.serializer(), withUsername)
             assertEquals(stringified, "{\"identifier\":\"$testUsername\"}")
-            val deserialized = NonstrictTestsJsonFormat.parse(Example.serializer(), stringified)
+            val deserialized = TestsJsonFormat.parse(Example.serializer(), stringified)
             assertEquals(withUsername, deserialized)
         }
 
         // Replace @ by empty string, because from time to time we can retrieve from Telegram system
         // username without starting @ symbol
         Example(testUsername.toUsername()).let { withUsername ->
-            val stringified = NonstrictTestsJsonFormat.stringify(Example.serializer(), withUsername).replace("@", "")
+            val stringified = TestsJsonFormat.stringify(Example.serializer(), withUsername).replace("@", "")
             assertEquals("{\"identifier\":\"${testUsername.replace("@", "")}\"}", stringified)
-            val deserialized = NonstrictTestsJsonFormat.parse(Example.serializer(), stringified)
+            val deserialized = TestsJsonFormat.parse(Example.serializer(), stringified)
             assertEquals(withUsername, deserialized)
         }
     }