diff --git a/build-aux/flatpak/io.github.Bavarder.Bavarder.json b/build-aux/flatpak/io.github.Bavarder.Bavarder.json
index fc7f56d..b8d3931 100644
--- a/build-aux/flatpak/io.github.Bavarder.Bavarder.json
+++ b/build-aux/flatpak/io.github.Bavarder.Bavarder.json
@@ -47,6 +47,17 @@
                 }
             ]
         },
+        {
+            "name": "gtk",
+            "buildsystem": "meson",
+            "sources": [
+                {
+                    "type": "git",
+                    "url": "https://gitlab.gnome.org/GNOME/gtk.git",
+                    "tag": "4.11.2"
+                }
+            ]
+        },
         {
             "name": "libadwaita",
             "buildsystem": "meson",