diff --git a/build.gradle.kts b/build.gradle.kts
index 7caa71c9896..84d30554470 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -12,7 +12,7 @@ import proguard.gradle.ProGuardTask
 buildscript {
     extra["defaultSnapshotVersion"] = "1.2-SNAPSHOT"
 
-    kotlinBootstrapFrom(BootstrapOption.TeamCity("1.2.40-dev-967", onlySuccessBootstrap = false))
+    kotlinBootstrapFrom(BootstrapOption.TeamCity("1.2.50-dev-310", onlySuccessBootstrap = false))
 
     val mirrorRepo: String? = findProperty("maven.repository.mirror")?.toString()