diff --git a/src/app/v1/load-by-tile.ts b/src/app/v1/load-by-tile.ts
index 870991d..e4f1bdb 100644
--- a/src/app/v1/load-by-tile.ts
+++ b/src/app/v1/load-by-tile.ts
@@ -8,9 +8,9 @@ import {fromWorldCoordinates, tileToWorld} from '../lib/projection/projection';
 const getTileRequestSchema = z
     .object({
         limit: numericString(z.number().int().min(100).max(10000).default(1000)),
-        x: numericString(z.number().int().min(0)),
-        y: numericString(z.number().int().min(0)),
-        z: numericString(z.number().int().min(0))
+        x: numericString(z.number().int()),
+        y: numericString(z.number().int()),
+        z: numericString(z.number().int())
     })
     .strict();