diff --git a/external/github.com/gorilla/websocket/server.go b/external/github.com/gorilla/websocket/server.go
index 7bcb23b7b..cc0121d3b 100644
--- a/external/github.com/gorilla/websocket/server.go
+++ b/external/github.com/gorilla/websocket/server.go
@@ -153,7 +153,7 @@ func (u *Upgrader) Upgrade(w http.ResponseWriter, r *http.Request, responseHeade
 
 	challengeKey := r.Header.Get("Sec-Websocket-Key")
 	if challengeKey == "" {
-		return u.returnError(w, r, http.StatusBadRequest, "websocket: not a websocket handshake: `Sec-WebSocket-Key' header is missing or blank")
+		return u.returnError(w, r, http.StatusBadRequest, "websocket: not a websocket handshake: 'Sec-WebSocket-Key' header is missing or blank")
 	}
 
 	subprotocol := u.selectSubprotocol(r, responseHeader)