diff --git a/lib/runner.js b/lib/runner.js
index b9ba118..76af541 100644
--- a/lib/runner.js
+++ b/lib/runner.js
@@ -262,9 +262,9 @@ async function _executeTest(url, options) {
       options.userUuid || null,
       options.userIp || null,
       isMobile,
-      summary.scores,
-      summary.metrics,
-      filmstripData
+      JSON.stringify(summary.scores),
+      JSON.stringify(summary.metrics),
+      JSON.stringify(filmstripData)
     ];
 
     try {