diff --git a/app/root.test.ts b/app/root.test.ts
index 96e868fa..edeb0169 100644
--- a/app/root.test.ts
+++ b/app/root.test.ts
@@ -37,7 +37,7 @@ describe('root loader', () => {
 			{ ...payload, exp: Math.round(inFiveMinutes.getTime() / 1000) },
 			signature,
 		]
-			.map((s) => btoa(JSON.stringify(s)))
+			.map((s) => Buffer.from(JSON.stringify(s)).toString('base64'))
 			.join('.')}`
 
 		const url = new URL('https://orange.cloudflare.dev/')
diff --git a/app/root.tsx b/app/root.tsx
index e8bbe34a..b87e6343 100644
--- a/app/root.tsx
+++ b/app/root.tsx
@@ -56,7 +56,7 @@ export const loader = async ({ request, context }: LoaderFunctionArgs) => {
 	if (!CF_Authorization) return defaultResponse
 
 	const [, payload] = CF_Authorization.split('.')
-	const data = JSON.parse(atob(payload))
+	const data = JSON.parse(Buffer.from(payload, 'base64').toString())
 	const expires = new Date(data.exp * 1000)
 	const now = new Date()
 	if (addOneDay(now) > expires) {