diff --git a/lib/Lacuna/DB/Result/Building/Module.pm b/lib/Lacuna/DB/Result/Building/Module.pm
index 97b12476..334dae30 100644
--- a/lib/Lacuna/DB/Result/Building/Module.pm
+++ b/lib/Lacuna/DB/Result/Building/Module.pm
@@ -58,7 +58,13 @@ before can_upgrade => sub {
     my $self = shift;
     my $plan = $self->body->get_plan($self->class, $self->level + 1);
     if (defined $plan) {
-        return 1;
+        my $command = $self->body->command;
+        if ($command->level >= $self->level + 1 || $self->isa('Lacuna::DB::Result::Building::StationCommand')) {
+            return 1;
+        }
+        else {
+            confess [1013, 'A module cannot be upgraded past the level of station command.'];
+        }
     }
     else {
         confess [1013, 'You need a plan to upgrade this module.'];
diff --git a/var/www/public/changes.txt b/var/www/public/changes.txt
index a8c73fd8..7f923436 100644
--- a/var/www/public/changes.txt
+++ b/var/www/public/changes.txt
@@ -1,6 +1,7 @@
 3.0400
  - Add: Added the Opera House, Art Museum, and Culinary Institute space station modules.
  - Rule: SAWs now cost less in upkeep.
+ - Rule: Station modules cannot be upgraded past the station command level.
  - API: Added proposing enacting writs at Parliament level 4.
  - API: Added transfering ownership of stations at Parliament level 5.
  - API: Added proposing firing the station's BFG at Parliament level 30.