diff --git a/src/factories/history-state-factory.ts b/src/factories/history-state-factory.ts
index e434f13..d04aec9 100644
--- a/src/factories/history-state-factory.ts
+++ b/src/factories/history-state-factory.ts
@@ -48,7 +48,7 @@ export const hasQueue = (): boolean => queueLength() > 0;
 export const queueLength = (): number => stateQueue.size;
 
 export const flushQueue = (): void => {
-    clearTimeout( timeout );
+    window.clearTimeout( timeout );
     stateQueue.clear();
 };
 
@@ -80,13 +80,13 @@ export const enqueueState = ( key: string, undoRedoState: UndoRedoState ): void
         processQueue();
     }
     stateQueue.set( key, undoRedoState );
-    setTimeout( processQueue, ENQUEUE_TIMEOUT );
+    window.setTimeout( processQueue, ENQUEUE_TIMEOUT );
 };
 
 /* internal methods */
 
 function processQueue(): void {
-    clearTimeout( timeout );
+    window.clearTimeout( timeout );
     stateQueue.forEach( undoRedoState => store.commit( "saveState", undoRedoState ));
     stateQueue.clear();
 }
diff --git a/src/rendering/canvas-elements/layer-sprite.ts b/src/rendering/canvas-elements/layer-sprite.ts
index 6520bf7..6458a34 100644
--- a/src/rendering/canvas-elements/layer-sprite.ts
+++ b/src/rendering/canvas-elements/layer-sprite.ts
@@ -425,14 +425,14 @@ class LayerSprite extends ZoomableSprite {
     }
 
     debouncePaintStore( timeout: number = 5000 ): void {
-        this._pendingPaintState = setTimeout( this.storePaintState.bind( this ), timeout ) as unknown as number;
+        this._pendingPaintState = window.setTimeout( this.storePaintState.bind( this ), timeout ) as unknown as number;
     }
 
     async storePaintState(): Promise<boolean> {
         if ( !this._pendingPaintState ) {
             return true;
         }
-        clearTimeout( this._pendingPaintState );
+        window.clearTimeout( this._pendingPaintState );
         if ( this._brush.down ) {
             // still painting, debounce again (layer.source only updated on handleRelease())
             this.debouncePaintStore( 1000 );