diff --git a/manifest.json b/manifest.json
index 556afee..85b2089 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,6 +1,7 @@
 {
   "short_name": "Sentinel",
   "name": "Sentinel",
+  "lang": "en-GB",
   "icons": [
     {
       "src": "/",