diff --git a/app.js b/app.js
index eab5431..4aea53c 100644
--- a/app.js
+++ b/app.js
@@ -95,7 +95,7 @@ app.get("/api/building/:id", async (req, res) => {
     }
 
     const [nextLevel] = await db.query(
-      "SELECT required_points FROM building_levels WHERE building_id=? AND level=?",
+      "SELECT required_points, wood, stone FROM building_levels WHERE building_id=? AND level=?",
       [buildingId, building.level + 1],
     );
 
@@ -111,7 +111,7 @@ app.get("/api/building/:id", async (req, res) => {
       nextLevelPoints: nextLevel[0]?.required_points || null,
       description: info[0].description,
       history: info[0].history,
-      upgradeCost: "500 Holz, 200 Stein",
+      upgradeCost: `${nextLevel[0]?.wood} Holz, ${nextLevel[0]?.stone} Stein`,
     });
   } catch (err) {
     console.error(err);