diff --git a/src/game/building_factory.cr b/src/game/building_factory.cr
index a951d25..5eeed31 100644
--- a/src/game/building_factory.cr
+++ b/src/game/building_factory.cr
@@ -15,7 +15,7 @@ module Game
         Building.new Building::Type::CrystalMiner, **{
           shortcut:     "miner",
           construction: Construction.new(
-            ts: 10,
+            ts: 30,
             cost: ResourceBag.new,
             requirements: [] of Game::Building::Type
           ),
@@ -31,7 +31,7 @@ module Game
         Building.new Building::Type::CrystalRestorer, **{
           shortcut:     "rest",
           construction: Construction.new(
-            ts: 30,
+            ts: 45,
             cost: ResourceBag.new({
               Resource::Type::Crystals => 100,
             }),
diff --git a/src/game/command.cr b/src/game/command.cr
index db6f3b0..fef0ec0 100644
--- a/src/game/command.cr
+++ b/src/game/command.cr
@@ -25,6 +25,7 @@ module Game
         raise InvalidPlaceForBuilding.new
       end
       # @todo check requirements
+      world.resources.dec construction.cost
       world.map.set(ConstructionSiteTile.new(@point))
       construction.ts
     end