diff --git a/build-aux/flatpak/org.gtk.Demo4.json b/build-aux/flatpak/org.gtk.Demo4.json
index e1813fa968..c3f69c7a48 100644
--- a/build-aux/flatpak/org.gtk.Demo4.json
+++ b/build-aux/flatpak/org.gtk.Demo4.json
@@ -43,7 +43,8 @@
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://gitlab.freedesktop.org/wayland/wayland.git"
+                    "url" : "https://gitlab.freedesktop.org/wayland/wayland.git",
+                    "branch" : "main"
                 }
             ]
         },
diff --git a/build-aux/flatpak/org.gtk.IconBrowser4.json b/build-aux/flatpak/org.gtk.IconBrowser4.json
index 908a197d7d..000374911a 100644
--- a/build-aux/flatpak/org.gtk.IconBrowser4.json
+++ b/build-aux/flatpak/org.gtk.IconBrowser4.json
@@ -43,7 +43,8 @@
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://gitlab.freedesktop.org/wayland/wayland.git"
+                    "url" : "https://gitlab.freedesktop.org/wayland/wayland.git",
+                    "branch" : "main"
                 }
             ]
         },
diff --git a/build-aux/flatpak/org.gtk.WidgetFactory4.json b/build-aux/flatpak/org.gtk.WidgetFactory4.json
index dadb6198e4..1d51d1b7c2 100644
--- a/build-aux/flatpak/org.gtk.WidgetFactory4.json
+++ b/build-aux/flatpak/org.gtk.WidgetFactory4.json
@@ -43,7 +43,8 @@
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://gitlab.freedesktop.org/wayland/wayland.git"
+                    "url" : "https://gitlab.freedesktop.org/wayland/wayland.git",
+                    "branch" : "main"
                 }
             ]
         },