diff --git a/electron_app/riot.im/config.json b/electron_app/riot.im/config.json
index 10b453a469..2a52a5117d 100644
--- a/electron_app/riot.im/config.json
+++ b/electron_app/riot.im/config.json
@@ -21,6 +21,15 @@
         "siteId": 1,
         "policyUrl": "https://matrix.org/docs/guides/riot_im_cookie_policy"
     },
+    "phasedRollOut": {
+        "feature_lazyloading": {
+            "offset": 1539684000000,
+            "period": 604800000
+        }
+    },
+    "features": {
+        "feature_lazyloading": "enable"
+    },
     "enable_presence_by_hs_url": {
         "https://matrix.org": false
     }