diff --git a/docs/_layouts/default.html b/docs/_layouts/default.html
index edc1451bc..ce32117e8 100644
--- a/docs/_layouts/default.html
+++ b/docs/_layouts/default.html
@@ -42,6 +42,25 @@
       defer
       src="https://use.fontawesome.com/releases/v5.7.2/js/all.js"
     ></script>
+    {% if page.lang == "zh" %}
+    <script>
+      ((window.gitter = {}).chat = {}).options = {
+        room: "SpaceVim/cn",
+      };
+    </script>
+    {% else %}
+    <script>
+      ((window.gitter = {}).chat = {}).options = {
+        room: "SpaceVim/SpaceVim",
+      };
+    </script>
+    {% endif %}
+
+    <script
+      src="https://sidecar.gitter.im/dist/sidecar.v1.js"
+      async
+      defer
+    ></script>
     <meta http-equiv="X-UA-Compatible" content="chrome=1" />
     <link rel="stylesheet" href="{{ '/assets/css/main.css' | relative_url }}" />
     {% if page.lang == "zh" %}