diff --git a/src/layer/GeoJSONWorkerLayer.js b/src/layer/GeoJSONWorkerLayer.js
index c34e5c6..a308b07 100644
--- a/src/layer/GeoJSONWorkerLayer.js
+++ b/src/layer/GeoJSONWorkerLayer.js
@@ -225,6 +225,11 @@ class GeoJSONWorkerLayer extends Layer {
           this.add(this._polygonMesh);
         }
 
+        // Clean up
+        results.attributes = null;
+        results.flats = null;
+        results = null;
+
         resolve();
       });
     });