diff --git a/build.gradle.kts b/build.gradle.kts
index 8b193107afb..3e57b4a487c 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -70,7 +70,7 @@ val defaultSnapshotVersion: String by extra
 val buildNumber by extra(findProperty("build.number")?.toString() ?: defaultSnapshotVersion)
 val kotlinVersion by extra(findProperty("deployVersion")?.toString() ?: buildNumber)
 
-val kotlinLanguageVersion by extra("1.3")
+val kotlinLanguageVersion by extra("1.4")
 
 allprojects {
     group = "org.jetbrains.kotlin"