diff --git a/src/css/main.css b/src/css/main.css
index 98fa540c..3eb1c3fc 100644
--- a/src/css/main.css
+++ b/src/css/main.css
@@ -61,7 +61,7 @@ body {
 
 .map {
   height: 100%;
-  width: 76%;
+  width: calc(100% - 305px);
   float: left;
 }