diff --git a/client/src/utils.rs b/client/src/utils.rs
index d473cde..d7d836c 100644
--- a/client/src/utils.rs
+++ b/client/src/utils.rs
@@ -403,7 +403,7 @@ export function define_property(obj, k, v) {
 export function ws_key() {
 	let key = new Uint8Array(16);
 	crypto.getRandomValues(key);
-	return btoa(Array.from(key).map(String.fromCharCode).join(''));
+	return btoa(String.fromCharCode.apply(null, key));
 }
 
 export function from_entries(entries){
diff --git a/client/src/websocket.rs b/client/src/websocket.rs
index af271f4..80a0f66 100644
--- a/client/src/websocket.rs
+++ b/client/src/websocket.rs
@@ -60,7 +60,7 @@ impl EpoxyWebSocket {
 				.method(Method::GET)
 				.uri(url.clone())
 				.header(HOST, host)
-				.header(CONNECTION, "upgrade")
+				.header(CONNECTION, "Upgrade")
 				.header(UPGRADE, "websocket")
 				.header(SEC_WEBSOCKET_KEY, ws_key())
 				.header(SEC_WEBSOCKET_VERSION, "13")