diff --git a/lib/cartodb/cartodb_windshaft.js b/lib/cartodb/cartodb_windshaft.js
index 26e84eed..f450240a 100644
--- a/lib/cartodb/cartodb_windshaft.js
+++ b/lib/cartodb/cartodb_windshaft.js
@@ -9,6 +9,9 @@ var CartodbWindshaft = function(serverOptions) {
     // set the cache chanel info to invalidate the cache on the frontend server
     serverOptions.afterTileRender = function(req, res, tile, headers, callback) {
         res.header('X-Cache-Channel', req.params.dbname);
+        // note - may not be invalidating properly
+        res.header('Last-Modified', new Date().toUTCString());
+        res.header('Cache-Control', 'no-cache,must-revalidate, public');
         callback(null, tile, headers);
     };
 
diff --git a/lib/cartodb/varnish.js b/lib/cartodb/varnish.js
index 439ee46e..ab9910f7 100644
--- a/lib/cartodb/varnish.js
+++ b/lib/cartodb/varnish.js
@@ -35,7 +35,7 @@ function VarnishClient(host, port, ready_callback) {
 
     connect();
 
-    client.on('data', function(data) {
+    client.on('data', function (data) {
         data = data.toString();
         lines = data.split('\n', 2);
         if(lines.length == 2) {