diff --git a/hm/extra.nix b/hm/extra.nix
index b346f05..253266a 100644
--- a/hm/extra.nix
+++ b/hm/extra.nix
@@ -19,6 +19,9 @@
       # android tools
       android-tools
 
+      # Communication
+      signal-desktop
+
       # downloading
       # transmission TODO Collision if both transmissions are active?