diff --git a/flake.lock b/flake.lock
index 4e6b63f..a4a6020 100644
--- a/flake.lock
+++ b/flake.lock
@@ -27,15 +27,16 @@
         "treefmt-nix": "treefmt-nix"
       },
       "locked": {
-        "lastModified": 1777481115,
-        "narHash": "sha256-9YKAG9ErJz4/HpiMpmixKJo+IKkRnXhoaSfkoOyj2o0=",
+        "lastModified": 1777364820,
+        "narHash": "sha256-XHxV1V62RJlU/Y49WD6fNIyESJCHKMVwuoN+WIa3gLg=",
         "ref": "refs/heads/main",
-        "rev": "e6cae5b8eda99337ca78b1500e913932f966c9f4",
-        "revCount": 6730,
+        "rev": "1cc9dbf2a47b7b329507cc4ddc970e10b968121c",
+        "revCount": 6618,
         "type": "git",
         "url": "https://forgejo.ellis.link/continuwuation/continuwuity"
       },
       "original": {
+        "rev": "1cc9dbf2a47b7b329507cc4ddc970e10b968121c",
         "type": "git",
         "url": "https://forgejo.ellis.link/continuwuation/continuwuity"
       }
diff --git a/flake.nix b/flake.nix
index a5605fe..bae9a27 100644
--- a/flake.nix
+++ b/flake.nix
@@ -13,7 +13,11 @@
     };
 
     continuwuity = {
-      url = "git+https://forgejo.ellis.link/continuwuation/continuwuity";
+      # Pinned: revs after 1cc9dbf2 (revCount > 6618) bumped ruma to a version
+      # where RtcFocusInfo / RtcTransport use a hand-rolled
+      # Box::<RawJsonValue>::deserialize impl that toml-rs can't satisfy,
+      # breaking any non-empty matrix_rtc.foci config.
+      url = "git+https://forgejo.ellis.link/continuwuation/continuwuity?rev=1cc9dbf2a47b7b329507cc4ddc970e10b968121c";
     };
 
     dicebot = {
diff --git a/services/matrix.nix b/services/matrix.nix
index 45de740..dc139f7 100644
--- a/services/matrix.nix
+++ b/services/matrix.nix
@@ -28,17 +28,16 @@
       turn_secret_file = config.sops.secrets."coturn/auth_secret_home".path;
       turn_ttl = 86400;
 
-      matrix_rtc.foci = [];
+      matrix_rtc.foci = [
+        {
+          type = "livekit";
+          livekit_service_url = "https://lk-jwt.ellie.town";
+        }
+      ];
 
       well_known = {
         client = "https://matrix.ellie.town";
         server = "matrix.ellie.town:443";
-        rtc_focus_server_urls = [
-          {
-            type = "livekit";
-            livekit_service_url = "https://lk-jwt.ellie.town";
-          }
-        ];
       };
     };
   };