diff --git a/build.gradle.kts b/build.gradle.kts
index eeb6d1d1e5c..5a6cf5b1b90 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -60,7 +60,7 @@ val kotlinVersion by extra(
     } ?: buildNumber
 )
 
-val kotlinLanguageVersion by extra("1.8")
+val kotlinLanguageVersion by extra("1.9")
 
 extra["kotlin_root"] = rootDir