diff --git a/enhancer/cli/train_config/config.yaml b/enhancer/cli/train_config/config.yaml
index 8d0ab14..9c464ac 100644
--- a/enhancer/cli/train_config/config.yaml
+++ b/enhancer/cli/train_config/config.yaml
@@ -1,6 +1,6 @@
 defaults:
   - model : Demucs
-  - dataset : Vctk
+  - dataset : DNS-2020
   - optimizer : Adam
   - hyperparameters : default
   - trainer : default
diff --git a/enhancer/cli/train_config/dataset/DNS-2020.yaml b/enhancer/cli/train_config/dataset/DNS-2020.yaml
index 7381ea3..216f1a1 100644
--- a/enhancer/cli/train_config/dataset/DNS-2020.yaml
+++ b/enhancer/cli/train_config/dataset/DNS-2020.yaml
@@ -4,6 +4,7 @@ name : dns-2020
 duration : 5.0
 sampling_rate: 16000
 batch_size: 64
+valid_size: 0.05
 files:
   train_clean : Clean_training
   test_clean : Clean_testing