diff --git a/gradle.properties b/gradle.properties
index 9536e717b2..400991f3e0 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,7 @@
 # Kotlin
 version=1.8.1-Beta-SNAPSHOT
 group=org.jetbrains.kotlinx
-kotlin_version=1.9.21
+kotlin_version=1.9.23
 # DO NOT rename this property without adapting kotlinx.train build chain:
 atomicfu_version=0.23.1
 
diff --git a/integration-testing/gradle.properties b/integration-testing/gradle.properties
index 3813e13826..2d61205097 100644
--- a/integration-testing/gradle.properties
+++ b/integration-testing/gradle.properties
@@ -1,4 +1,4 @@
-kotlin_version=1.9.21
+kotlin_version=1.9.23
 coroutines_version=1.8.1-Beta-SNAPSHOT
 asm_version=9.3