diff --git a/gradle.properties b/gradle.properties
index ae2c02db3ae..34d85ab19c6 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -17,7 +17,7 @@ kotlin.build.useIR=true
 #maven.repository.mirror=http://repository.jetbrains.com/remote-repos/
 #bootstrap.kotlin.repo=https://dl.bintray.com/kotlin/kotlin-dev
 #bootstrap.kotlin.version=1.1.50-dev-1451
-bootstrap.kotlin.default.version=1.4.30-dev-2196
+bootstrap.kotlin.default.version=1.5.0-dev-309
 
 kotlin.build.publishing.attempts=20
 #signingRequired=true