diff --git a/config/index.html b/config/index.html
index 7809250..d249425 100644
--- a/config/index.html
+++ b/config/index.html
@@ -114,9 +114,9 @@ <h1 class='title'>Engineering</h1>
     var imperialUnits = document.getElementById('imperial_radio');
     var metricUnits = document.getElementById('metric_radio');
 
-    var units = 'us';
+    var units = 'imperial';
     if (metricUnits.checked) {
-      units = 'si';
+      units = 'metric';
     }
 
     var options = {