diff --git a/src/Frame.jsx b/src/Frame.jsx
index ae88480..8470f30 100644
--- a/src/Frame.jsx
+++ b/src/Frame.jsx
@@ -95,9 +95,10 @@ export class Frame extends Component {
 
   // In certain situations on a cold cache DOMContentLoaded never gets called
   // fallback to an interval to check if that's the case
-  loadCheck = setInterval(function loadCheckCallback() {
-    this.handleLoad();
-  }, 500);
+  loadCheck = () =>
+    setInterval(() => {
+      this.handleLoad();
+    }, 500);
 
   renderFrameContents() {
     if (!this._isMounted) {