diff --git a/addons/addon-canvas/src/CanvasRenderer.ts b/addons/addon-canvas/src/CanvasRenderer.ts
index a8e01b1a..947213d4 100644
--- a/addons/addon-canvas/src/CanvasRenderer.ts
+++ b/addons/addon-canvas/src/CanvasRenderer.ts
@@ -22,7 +22,7 @@ import { IRenderLayer } from './Types';
 export class CanvasRenderer extends Disposable implements IRenderer {
   private _renderLayers: IRenderLayer[];
   private _devicePixelRatio: number;
-  private _observerDisposable : IDisposable| undefined;
+  private _observerDisposable: IDisposable | undefined;
 
   public dimensions: IRenderDimensions;
 
diff --git a/addons/addon-webgl/src/WebglRenderer.ts b/addons/addon-webgl/src/WebglRenderer.ts
index db3c28c8..b5f378c2 100644
--- a/addons/addon-webgl/src/WebglRenderer.ts
+++ b/addons/addon-webgl/src/WebglRenderer.ts
@@ -33,7 +33,7 @@ export class WebglRenderer extends Disposable implements IRenderer {
   private _charAtlasDisposable = this.register(new MutableDisposable());
   private _charAtlas: ITextureAtlas | undefined;
   private _devicePixelRatio: number;
-  private _observerDisposable : IDisposable| undefined;
+  private _observerDisposable: IDisposable | undefined;
 
   private _model: RenderModel = new RenderModel();
   private _workCell: CellData = new CellData();