diff --git a/tools/net.supercellwx.app.yml b/tools/net.supercellwx.app.yml
index 9c4c3f72..a31fa255 100644
--- a/tools/net.supercellwx.app.yml
+++ b/tools/net.supercellwx.app.yml
@@ -31,6 +31,8 @@ finish-args:
   - --socket=wayland
   # GPU acceleration if needed
   - --device=dri
+  # Needs access to serial port devices
+  - --device=serial
   # Needs to talk to the network:
   - --share=network
   # Needs to save files locally