diff --git a/history.js b/history.js
index 1f71f8d..701cd44 100644
--- a/history.js
+++ b/history.js
@@ -215,7 +215,7 @@ function mkmap(map, newnodes, lostnodes, onlinenodes, graph, gotoAnything) {
   L.tileLayer("http://otile{s}.mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.jpg", {
     subdomains: "1234",
     type: "osm",
-    attribution: "Map data Tiles &copy; <a href=\"http://www.mapquest.com/\" target=\"_blank\">MapQuest</a> <img src=\"http://developer.mapquest.com/content/osm/mq_logo.png\" />, Map data © OpenStreetMap contributors, CC-BY-SA",
+    attribution: "Map data Tiles &copy; <a href=\"https://www.mapquest.com/\" target=\"_blank\">MapQuest</a> <img src=\"https://developer.mapquest.com/content/osm/mq_logo.png\" />, Map data © OpenStreetMap contributors, CC-BY-SA",
     maxZoom: 18
   }).addTo(map)