diff --git a/scripts/40-mapflow-runtime-config.sh b/scripts/40-mapflow-runtime-config.sh
index 0394798..5100f95 100644
--- a/scripts/40-mapflow-runtime-config.sh
+++ b/scripts/40-mapflow-runtime-config.sh
@@ -42,6 +42,11 @@ else
   MAPBOX_STYLE="${MAPBOX_STYLE:-mapbox/standard}"
 fi
 
+if [ -z "$MAPBOX_ACCESS_TOKEN" ]; then
+  echo "MAPBOX_ACCESS_TOKEN is required." >&2
+  exit 1
+fi
+
 cat >"$config_path" <<EOF
 window.__MAPFLOW_CONFIG__ = {
   mapboxAccessToken: $(json_string "$MAPBOX_ACCESS_TOKEN"),
diff --git a/web/index.html b/web/index.html
index c50f9f5..fb9f13b 100644
--- a/web/index.html
+++ b/web/index.html
@@ -33,6 +33,8 @@
 
   <title>MapFlow</title>
   <link rel="manifest" href="manifest.json">
+  <link href="https://api.mapbox.com/mapbox-gl-js/v3.25.0/mapbox-gl.css" rel="stylesheet">
+  <script src="https://api.mapbox.com/mapbox-gl-js/v3.25.0/mapbox-gl.js"></script>
   <script src="https://telegram.org/js/telegram-web-app.js"></script>
   <style>
     html,
diff --git a/web/index.prod.html b/web/index.prod.html
index 3dd0889..4b4b804 100644
--- a/web/index.prod.html
+++ b/web/index.prod.html
@@ -19,6 +19,8 @@
 
   <title>MapFlow</title>
   <link rel="manifest" href="manifest.json">
+  <link href="https://api.mapbox.com/mapbox-gl-js/v3.25.0/mapbox-gl.css" rel="stylesheet">
+  <script src="https://api.mapbox.com/mapbox-gl-js/v3.25.0/mapbox-gl.js"></script>
   <style>
     #sw-loading {
       background: #05030B !important;