diff --git a/lib/roles/http/server/server.c b/lib/roles/http/server/server.c
index 6c635c5a3..b05e949e6 100644
--- a/lib/roles/http/server/server.c
+++ b/lib/roles/http/server/server.c
@@ -441,6 +441,7 @@ static const struct lws_mimetype {
 	{ ".txt", "text/plain" },
 	{ ".xml", "application/xml" },
 	{ ".json", "application/json" },
+	{ ".mjs", "text/javascript" },
 };
 
 const char *