diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76d2f6f..8adeb9f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 ### Changed
 - GitHub Actions: Build workflow refactoring
 - Upgrade Gradle Wrapper to `8.2`
+- Dependencies - upgrade `org.jetbrains.kotlin.jvm` to `1.9.0`
 - Dependencies - upgrade `org.jetbrains.intellij` to `1.14.2`
 - Dependencies (GitHub Actions) - upgrade `JetBrains/qodana-action` to `v2023.1.5`
 
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index f486214..c7b3856 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -4,7 +4,7 @@ annotations = "24.0.1"
 
 # plugins
 dokka = "1.8.10"
-kotlin = "1.8.21"
+kotlin = "1.9.0"
 changelog = "2.1.0"
 gradleIntelliJPlugin = "1.14.2"
 qodana = "0.1.13"