diff --git a/CHANGELOG.md b/CHANGELOG.md
index 46fdc74e19..f40916f633 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,10 @@
     * A lot of `TextSource` implementors was added. More info [here](src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/MessageEntity/textsources/)
         * All `MessageEntity` implementations now are using new `TextSource` analogues as delegates
 
+### 0.20.2
+
+* New exception type `MessageIsNotModifierException` was added
+
 ## 0.19.0 ImplicitReflection removing
 
 * Total rework of serialization for requests. Now all `SimpleRequest` children have:
diff --git a/build.gradle b/build.gradle
index df3dce2e6c..b74193cccf 100644
--- a/build.gradle
+++ b/build.gradle
@@ -17,7 +17,7 @@ plugins {
     id "org.jetbrains.kotlin.plugin.serialization" version "$kotlin_version"
 }
 
-project.version = "0.20.1"
+project.version = "0.20.2"
 project.group = "com.github.insanusmokrassar"
 
 apply from: "publish.gradle"
diff --git a/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/bot/exceptions/RequestException.kt b/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/bot/exceptions/RequestException.kt
index 6cdcbfcd34..63f777b830 100644
--- a/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/bot/exceptions/RequestException.kt
+++ b/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/bot/exceptions/RequestException.kt
@@ -8,11 +8,14 @@ fun newRequestException(
     plainAnswer: String,
     message: String? = null,
     cause: Throwable? = null
-) = when (response.description) {
-    "Bad Request: reply message not found" -> ReplyMessageNotFoundException(response, plainAnswer, message, cause)
-    "Unauthorized" -> UnauthorizedException(response, plainAnswer, message, cause)
-    else -> CommonRequestException(response, plainAnswer, message, cause)
-}
+) = response.description ?.let { description ->
+    when {
+        description == "Bad Request: reply message not found" -> ReplyMessageNotFoundException(response, plainAnswer, message, cause)
+        description.contains("Bad Request: message is not modified") -> MessageIsNotModifierException(response, plainAnswer, message, cause)
+        description == "Unauthorized" -> UnauthorizedException(response, plainAnswer, message, cause)
+        else -> null
+    }
+} ?: CommonRequestException(response, plainAnswer, message, cause)
 
 sealed class RequestException constructor(
     val response: Response,
@@ -32,3 +35,6 @@ class UnauthorizedException(response: Response, plainAnswer: String, message: St
 
 class ReplyMessageNotFoundException(response: Response, plainAnswer: String, message: String?, cause: Throwable?) :
     RequestException(response, plainAnswer, message, cause)
+
+class MessageIsNotModifierException(response: Response, plainAnswer: String, message: String?, cause: Throwable?) :
+    RequestException(response, plainAnswer, message, cause)