diff --git a/gradle.properties b/gradle.properties
index 66e7893..97f92f2 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,2 +1,2 @@
 kotlin.code.style=official
-kotlin_version=1.3.61
\ No newline at end of file
+kotlin_version=1.3.21
\ No newline at end of file