diff --git a/build-aux/flatpak/org.gnome.Calendar.json b/build-aux/flatpak/org.gnome.Calendar.json
index d0d1438d..13fd77fa 100644
--- a/build-aux/flatpak/org.gnome.Calendar.json
+++ b/build-aux/flatpak/org.gnome.Calendar.json
@@ -180,7 +180,8 @@
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://source.puri.sm/Librem5/libhandy.git"
+                    "url" : "https://source.puri.sm/Librem5/libhandy.git",
+                    "branch" : "libhandy-0-0"
                 }
             ]
         },