diff --git a/lib/less-browser/utils.js b/lib/less-browser/utils.js
index e7439535..7a645b1b 100644
--- a/lib/less-browser/utils.js
+++ b/lib/less-browser/utils.js
@@ -13,7 +13,10 @@ module.exports = {
                 if (opt === "env" || opt === "dumpLineNumbers" || opt === "rootpath" || opt === "errorReporting") {
                     options[opt] = tag.dataset[opt];
                 } else {
-                    options[opt] = JSON.parse(tag.dataset[opt]);
+                    try {
+                        options[opt] = JSON.parse(tag.dataset[opt]);
+                    }
+                    catch(_) {}
                 }
             }
         }