diff --git a/README.md b/README.md
index 3dcfe02..097e723 100644
--- a/README.md
+++ b/README.md
@@ -6,9 +6,10 @@
 
 </div>
 
-## Mapbox-PmTiles
-Add PmTiles support to mapbox
+## Mapbox-PMTiles
+Add [PMTiles](https://docs.protomaps.com/pmtiles/) support to Mapbox.
 
+This library requires Mapbox GL JS v3 to work.
 
 ## Usage
 
@@ -126,7 +127,7 @@ import mapboxPmtiles from 'https://cdn.jsdelivr.net/npm/mapbox-pmtiles@1.0.29/+e
 Just pass your `pmtile` url and this plugin will detect tileset's type and format from header automatically. ;) 
 
 
-## What is PmTiles
-See the [PmTiles](https://docs.protomaps.com/pmtiles/) repository for more information 
+## What is PMTiles
+See the [PMTiles](https://docs.protomaps.com/pmtiles/) repository for more information 
 
 
diff --git a/src/index.ts b/src/index.ts
index 8b52dd3..253981b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -206,7 +206,7 @@ export class PmTilesSource extends VectorTileSourceImpl {
     type = 'vector';
 
     scope: string | undefined;
-    dispatcher = undefined;
+    dispatcher?: { getActor(): any };
     reparseOverscaled: boolean = true;
     map!: MapboxMap;
 
@@ -460,7 +460,7 @@ export class PmTilesSource extends VectorTileSourceImpl {
 
         this.fixTile(tile)
         if (!tile.actor || tile.state === "expired") {
-            tile.actor = this._tileWorkers[url] = this._tileWorkers[url] || this.dispatcher.getActor();
+            tile.actor = this._tileWorkers[url] = this._tileWorkers[url] || this.dispatcher?.getActor();
 
             tile.request = this._protocol.tile({ ...request }, afterLoad);
             // always load tiles on the main thread and pass the result instead of requesting a worker to do so