diff --git a/cmd/eksterd/microsub.go b/cmd/eksterd/microsub.go
index 947bf9a..689cde3 100644
--- a/cmd/eksterd/microsub.go
+++ b/cmd/eksterd/microsub.go
@@ -47,7 +47,7 @@ func (h *microsubHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	if r.Method == http.MethodOptions {
 		w.Header().Add("Access-Control-Allow-Origin", "*")
 		w.Header().Add("Access-Control-Allow-Methods", "GET, POST")
-		w.Header().Add("Access-Control-Allow-Headers", "authorization,cache-control")
+		w.Header().Add("Access-Control-Allow-Headers", "Authorization, Cache-Control")
 		return
 	}