diff --git a/X11/default.nix b/X11/default.nix
index 6ce8805..bf8b342 100644
--- a/X11/default.nix
+++ b/X11/default.nix
@@ -32,5 +32,6 @@
         "x-scheme-handler/https" = [ "firefox.desktop" ];
         "x-scheme-handler/ftp" = [ "firefox.desktop" ];
         "x-scheme-handler/ftps" = [ "firefox.desktop" ];
+        "x-scheme-handler/mailspring" = [ "Mailspring.desktop" ];
     };
 }
diff --git a/X11/packages.nix b/X11/packages.nix
index 6880a1b..ac454af 100644
--- a/X11/packages.nix
+++ b/X11/packages.nix
@@ -18,6 +18,7 @@ in
         deluge # Torrent client
         mailspring
         discordPkg
+        pavucontrol # PulseAudio control panel
         # CLI stuff
         xsel # Clipboard management
         dex # .desktop file management, startup