diff --git a/src/components/App.tsx b/src/components/App.tsx
index 0a9cdb2d9..ecd9e5936 100644
--- a/src/components/App.tsx
+++ b/src/components/App.tsx
@@ -247,7 +247,9 @@ export default class App extends PureComponent<Props, State> {
 
 	focusPrevious = (): void => {
 		this.setState(previousState => {
-			const lastFocusableId = previousState.focusables.at(-1)?.id;
+			const lastFocusableId =
+				previousState.focusables[previousState.focusables.length - 1]?.id;
+
 			const previousFocusableId = this.findPreviousFocusable(previousState);
 
 			return {
diff --git a/src/output.ts b/src/output.ts
index 14279aaca..60df9811c 100644
--- a/src/output.ts
+++ b/src/output.ts
@@ -114,7 +114,7 @@ export default class Output {
 				let {x, y} = operation;
 				let lines = text.split('\n');
 
-				const clip = clips.at(-1);
+				const clip = clips[clips.length - 1];
 
 				if (clip) {
 					const clipHorizontally =