diff --git a/dist/d3kit.js b/dist/d3kit.js
index 8c0475d..29033df 100644
--- a/dist/d3kit.js
+++ b/dist/d3kit.js
@@ -640,7 +640,7 @@ return /******/ (function(modules) { // webpackBootstrap
 	  value: true
 	});
 
-	var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
+	var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
 
 	/**
 	 * Example usage:
diff --git a/dist/d3kit.min.js b/dist/d3kit.min.js
index a0e4ec1..b8d88da 100644
--- a/dist/d3kit.min.js
+++ b/dist/d3kit.min.js
@@ -1 +1 @@
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diff --git a/package.json b/package.json
index ce11831..1b0a639 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "d3kit",
-  "version": "2.0.1",
+  "version": "2.1.0",
   "description": "A kit of tools to speed D3 related project development.",
   "repository": {
     "type": "git",