diff --git a/modules/default.nix b/modules/default.nix
index c6e46b3..7934ae0 100644
--- a/modules/default.nix
+++ b/modules/default.nix
@@ -5,6 +5,7 @@
     ./networking.nix
     ./nix
     ./programs/firefox.nix
+    ./programs/thunderbird.nix
     ./programs/sway.nix
   ];
 }
diff --git a/modules/programs/thunderbird.nix b/modules/programs/thunderbird.nix
new file mode 100644
index 0000000..e0ff56d
--- /dev/null
+++ b/modules/programs/thunderbird.nix
@@ -0,0 +1,11 @@
+{ ... }:
+{
+  programs.thunderbird = {
+    enable = true;
+    preferencesStatus = "locked";
+    preferences = {
+      "mail.biff.play_sound" = false;
+      "mail.chat.play_sound" = false;
+    };
+  };
+}