diff --git a/samples/gradle.properties b/samples/gradle.properties
index cbcf78c817a..053a240e37a 100644
--- a/samples/gradle.properties
+++ b/samples/gradle.properties
@@ -2,7 +2,7 @@
 org.gradle.parallel=true
 
 # Pin Kotlin version:
-kotlin_version=1.3.11
+kotlin_version=1.3.21
 
 # Use custom Kotlin/Native home:
 org.jetbrains.kotlin.native.home=../../dist