diff --git a/index.js b/index.js
index cd9d840..d993250 100644
--- a/index.js
+++ b/index.js
@@ -101,7 +101,7 @@ function DottedMap({ height = 0, width = 0, countries = [], region, grid = 'vert
       }
     }
 
-    CACHE[cacheKey] = points;
+    CACHE[cacheKey] = { ...points };
   }
 
   return {
diff --git a/package.json b/package.json
index 700b6ed..6d92203 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "dotted-map",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "",
   "main": "index.js",
   "scripts": {