diff --git a/config/config.validation.yaml b/config/config.validation.yaml
index bc0b0048..b844cd2d 100644
--- a/config/config.validation.yaml
+++ b/config/config.validation.yaml
@@ -66,7 +66,7 @@ renewable:
     cutout: europe-2019-era5
   hydro:
     cutout: europe-2019-era5
-    flatten_dispatch: 0.2
+    flatten_dispatch: 0.1
 
 conventional:
   unit_commitment: true
@@ -106,5 +106,5 @@ solving:
   options:
     load_shedding: true
     rolling_horizon: false
-    horizon: 389
-    overlap: 24
+    horizon: 1000
+    overlap: 48