diff --git a/lib/config.js b/lib/config.js
index e2630825..46575239 100644
--- a/lib/config.js
+++ b/lib/config.js
@@ -63,6 +63,9 @@ export const siteConfig = (key, defaultVal = null, extendConfig = null) => {
     return defaultVal
   } else {
     if (typeof val === 'string') {
+      if (val === 'true' || val === 'false') {
+        return JSON.parse(val);
+      }
       return val;
     } else {
       try {