diff --git a/gradle.properties b/gradle.properties
index 1fc6a8f..9773f05 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,7 +6,7 @@ kotlin.incremental.js=true
 android.useAndroidX=true
 android.enableJetifier=true
 
-kotlin_version=1.4.20
+kotlin_version=1.4.21
 kotlin_serialisation_core_version=1.0.1
 
 # github_release_plugin_version=2.2.12