diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5206e921af..04e3fd93c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ some default library
 * Requests results now always decoding as `UTF-8`
 * `AbstractRequestCallFactory` was added with cache of methods urls to avoid memory leaks
 * Small refactoring of work with response in `KtorRequestsExecutor`
+* Kotlin version `1.3.30` -> `1.3.31`
 
 ## 0.13.0 Telegram Polls
 
diff --git a/gradle.properties b/gradle.properties
index 7f46ad5b74..d341c6ba14 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 kotlin.code.style=official
-kotlin_version=1.3.30
+kotlin_version=1.3.31
 kotlin_coroutines_version=1.2.0
 kotlin_serialisation_runtime_version=0.11.0
 joda_time_version=2.10.1