diff --git a/package.json b/package.json
index cfe6f6b..c3440af 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
     "webpack-stream": "^7.0.0"
   },
   "dependencies": {
-    "@arction/lcjs": "^5.1.1",
+    "@arction/lcjs": "^4.1.1",
     "@arction/xydata": "^1.4.0"
   },
   "lightningChart": {
diff --git a/src/index.js b/src/index.js
index 946ddab..3df4aeb 100644
--- a/src/index.js
+++ b/src/index.js
@@ -10,6 +10,6 @@ const lcjs = require('@arction/lcjs')
 const { lightningChart, MapTypes, Themes } = lcjs
 
 const mapChart = lightningChart().Map({
-    // theme: Themes.darkGold
+    theme: Themes[new URLSearchParams(window.location.search).get('theme') || 'darkGold'] || undefined,
     type: MapTypes.World,
 })