diff --git a/build/lib/gradio/static/js/gradio.js b/build/lib/gradio/static/js/gradio.js
index 44ca0842a5..64d55dcdef 100644
--- a/build/lib/gradio/static/js/gradio.js
+++ b/build/lib/gradio/static/js/gradio.js
@@ -253,7 +253,7 @@ function gradio_url(config, url, target, example_file_path) {
   return gradio(config, function(data, action) {
     return new Promise((resolve, reject) => {
       $.ajax({type: "POST",
-        url: url + action,
+        url: url + action + "/",
         data: JSON.stringify({"data": data}),
         dataType: 'json',
         contentType: 'application/json; charset=utf-8',
diff --git a/gradio/static/js/gradio.js b/gradio/static/js/gradio.js
index 44ca0842a5..64d55dcdef 100644
--- a/gradio/static/js/gradio.js
+++ b/gradio/static/js/gradio.js
@@ -253,7 +253,7 @@ function gradio_url(config, url, target, example_file_path) {
   return gradio(config, function(data, action) {
     return new Promise((resolve, reject) => {
       $.ajax({type: "POST",
-        url: url + action,
+        url: url + action + "/",
         data: JSON.stringify({"data": data}),
         dataType: 'json',
         contentType: 'application/json; charset=utf-8',