diff --git a/ext.json b/ext.json
new file mode 100644
index 0000000..f35f595
--- /dev/null
+++ b/ext.json
@@ -0,0 +1,20 @@
+{
+  "identifier": "org.chairbuilders.nierdark",
+  "name": "Nier dark theme",
+  "content_type": "SN|Theme",
+  "area": "themes",
+  "version": "1.0.0",
+  "description": "Nier Dark theme for Standard Notes",
+  "url": "https://git.chair.builders/public/sn-nier-dark-theme/raw/branch/master/dist/dist.css",
+  "latest_url": "https://git.chair.builders/public/sn-nier-dark-theme/raw/branch/master/dist/dist.css",
+  "download_url": "https://git.chair.builders/public/sn-nier-dark-theme/archive/master.zip",
+  "marketing_url": "https://git.chair.builders/public/sn-nier-dark-theme",
+  "dock_icon": {
+    "type": "circle",
+    "background_color": "#222222",
+    "foreground_color": "#222222",
+    "border_color": "#222222"
+  },
+  "statusBar": "dark-content"
+}
+