diff --git a/html/force-light.css b/html/force-light.css
index edb220e..e161d61 100644
--- a/html/force-light.css
+++ b/html/force-light.css
@@ -15,7 +15,7 @@
 .link line {
   stroke: #777;
   stroke-opacity: 1;
-  stroke-width: 2.5px;
+  stroke-width: 1.5px;
 }
 
 .link:hover line {