diff --git a/docs/Changelog.md b/docs/Changelog.md
index cda2b2c45c2..97c4edf1ca4 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -35,6 +35,7 @@ Nussknacker versions
 * [#1405](https://github.com/TouK/nussknacker/pull/1405) 'KafkaAvroSinkFactoryWithEditor' for more user-friendly Avro message definition. 
 * [#1510](https://github.com/TouK/nussknacker/pull/1510) `FlinkSource` API allows to create stream of `Context` (FlinkSource API and test support API refactoring).
 * [#1497](https://github.com/TouK/nussknacker/pull/1497) Initial support for multiple (named) schedules in `PeriodicProcessManager`
+* [#1499](https://github.com/TouK/nussknacker/pull/1499) ClassTag is provided in params in avro key-value deserialization schema factory: `KafkaAvroKeyValueDeserializationSchemaFactory`
 
 0.3.1 (not released yet) 
 ------------------------
diff --git a/docs/MigrationGuide.md b/docs/MigrationGuide.md
index d707b937259..841c626f8c0 100644
--- a/docs/MigrationGuide.md
+++ b/docs/MigrationGuide.md
@@ -49,6 +49,10 @@ To see biggest differences please consult the [changelog](Changelog.md).
   - For kafka sources `RecordFormatter` parses raw test data to `ConsumerRecord` which fits into deserializer (instead of `ProducerRecord` that required another transformation).
   - Definitions of names of common `Context` variables are moved to `VariableConstants` (instead of `Interpreter`).
 * [#1497](https://github.com/TouK/nussknacker/pull/1497) Changes in `PeriodicProcessManager`, change `PeriodicProperty` to `ScheduleProperty`
+* [#1499](https://github.com/TouK/nussknacker/pull/1499)
+  - trait `KafkaAvroDeserializationSchemaFactory` uses both key and value ClassTags and schemas (instead of value-only), check the order of parameters.
+  - ClassTag is provided in params in avro key-value deserialization schema factory: `KafkaAvroKeyValueDeserializationSchemaFactory`
+  - `BaseKafkaAvroSourceFactory` is able to read both key and value schema determiner to build proper DeserializationSchema (support for keys is not fully introduced in this change)
 
 ## In version 0.3.0