diff --git a/gradle.properties b/gradle.properties
index 0918ce1ff1f..d6005f9c0eb 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -8,7 +8,7 @@ kotlin.compiler.newInferenceEnabled=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=1.4.0-dev-5258
+bootstrap.kotlin.default.version=1.4.0-dev-6123
 
 #signingRequired=true
 
@@ -21,4 +21,4 @@ bootstrap.kotlin.default.version=1.4.0-dev-5258
 
 #kotlin.build.postprocessing=false
 #kotlin.build.java9=false
-#kotlin.build.useBootstrapStdlib=true
\ No newline at end of file
+#kotlin.build.useBootstrapStdlib=true