diff --git a/kotlin/build.gradle b/kotlin/build.gradle
index 0a1c46236..285cee243 100644
--- a/kotlin/build.gradle
+++ b/kotlin/build.gradle
@@ -34,7 +34,7 @@ buildscript {
       'hamcrest': '1.3',
       'intellijAnnotations': '13.0',
       'junit': '4.12',
-      'kotlin': '1.2.71',
+      'kotlin': '1.2.61',
       'kotlinCoroutines': '0.26.1',
       'ktlintPlugin': '5.1.0',
       'mavenPublishPlugin': '0.6.0',