diff --git a/demo/maps.html b/demo/maps.html
index 9f0f4c7..0028906 100644
--- a/demo/maps.html
+++ b/demo/maps.html
@@ -51,7 +51,7 @@
 
     <script type="module">
       import { FolkGeometry } from '../src/canvas/fc-geometry.ts';
-      import { FolkMap } from '../src/maps';
+      import { FolkMap } from '../src/folk-map.ts';
 
       FolkGeometry.register();
       FolkMap.register();
diff --git a/demo/spreadsheet-propagator.html b/demo/spreadsheet-propagator.html
index 144ac6c..c6a72a4 100644
--- a/demo/spreadsheet-propagator.html
+++ b/demo/spreadsheet-propagator.html
@@ -166,7 +166,7 @@
     ></event-propagator>
 
     <script type="module">
-      import { FolkMap } from '../src/maps';
+      import { FolkMap } from '../src/folk-map.ts';
       import { FolkGeometry } from '../src/canvas/fc-geometry.ts';
       import { EventPropagator } from '../src/arrows/event-propagator.ts';
       import { SpreadsheetTable } from '../src/spreadsheet/spreadsheet.ts';
diff --git a/src/maps/index.ts b/src/folk-map.ts
similarity index 100%
rename from src/maps/index.ts
rename to src/folk-map.ts