diff --git a/lib/event.js b/lib/event.js
index 04f338f..d70d05f 100644
--- a/lib/event.js
+++ b/lib/event.js
@@ -134,6 +134,12 @@ function exec(src, data, req, original) {
   if(Object.keys(state).length) {
     return state;
   }
+  
+  // process dates
+  Object.keys(data).forEach(function (key) {
+    if(data[key] && data[key].toISOString && data[key].toISOString.call) data[key] = data[key].toISOString();
+  })
+  
 }
 
 function sanitize(src) {