diff --git a/theme.html b/theme.html
index 4dbf83f21..6d0d7051b 100644
--- a/theme.html
+++ b/theme.html
@@ -14,6 +14,15 @@
     <link href="./css/wikipedia.css" rel="stylesheet"/>
     <meta content="website" property="og:type">
 
+    <link rel="preconnect" href="https://api.maptiler.com">
+    <link rel="dns-prefetch" href="https://api.maptiler.com">
+    <link rel="preconnect" href="https://api.openstreetmap.org">
+    <link rel="dns-prefetch" href="https://api.openstreetmap.com">
+    <link rel="preconnect" href="https://www.openstreetmap.org">
+    <link rel="dns-prefetch" href="https://www.openstreetmap.com">
+    <link rel="preconnect" href="https://cache.mapcomplete.org">
+    <link rel="dns-prefetch" href="https://cache.mapcomplete.com">
+
     <!-- THEME-SPECIFIC -->
     <!-- Every theme gets their own html page, this is created by a script; this part will be removed except for the index -->
     <title>MapComplete</title>