diff --git a/android/build.gradle b/android/build.gradle
index 2509649..ae70eb2 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -2,7 +2,7 @@ group 'com.github.chinloyal.pusher_client'
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.3.50'
+    ext.kotlin_version = '1.5.20'
     repositories {
         google()
         jcenter()
@@ -44,4 +44,4 @@ android {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-}
\ No newline at end of file
+}