diff --git a/site/src/routes/repl/[id]/_components/AppControls/index.svelte b/site/src/routes/repl/[id]/_components/AppControls/index.svelte
index c9bd27ca1b..6fed6ddbac 100644
--- a/site/src/routes/repl/[id]/_components/AppControls/index.svelte
+++ b/site/src/routes/repl/[id]/_components/AppControls/index.svelte
@@ -43,6 +43,9 @@
 			const r = await fetch(`repl/create.json`, {
 				method: 'POST',
 				credentials: 'include',
+				headers: {
+					'Content-Type': 'application/json'
+				},
 				body: JSON.stringify({
 					name,
 					files: components.map(component => ({