diff --git a/packages/core/android/build.gradle b/packages/core/android/build.gradle
index 10802d17..513845a5 100644
--- a/packages/core/android/build.gradle
+++ b/packages/core/android/build.gradle
@@ -39,6 +39,7 @@ repositories {
 }
 
 dependencies {
+    def defaultKotlinVersion = '1.3.21'
     api 'com.segment.analytics.android:analytics:4.5.0-beta.0'
 
     api 'com.facebook.react:react-native:+'