diff --git a/machines/moritz-server/mail-server.nix b/machines/moritz-server/mail-server.nix
index 14d87cf..debce59 100644
--- a/machines/moritz-server/mail-server.nix
+++ b/machines/moritz-server/mail-server.nix
@@ -60,6 +60,7 @@
   services.roundcube = {
     enable = true;
     hostName = "webmail.moritz.foo";
+    dicts = with pkgs.aspellDicts; [en de];
     extraConfig = ''
       # starttls needed for authentication, so the fqdn required to match
       # the certificate