diff --git a/index.d.ts b/index.d.ts
index 21e7ae6..3177508 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -5,6 +5,7 @@ namespace DottedMapLib {
     countries?: string[];
     region?: { lat: { min: number; max: number }; lng: { min: number; max: number } };
     grid?: 'vertical' | 'diagonal';
+    avoidOuterPins?: false | true;
   }
 
   interface SvgOptions {