diff --git a/serl_launcher/serl_launcher/networks/reward_classifier.py b/serl_launcher/serl_launcher/networks/reward_classifier.py
index b2109ff1..6cdf3c93 100644
--- a/serl_launcher/serl_launcher/networks/reward_classifier.py
+++ b/serl_launcher/serl_launcher/networks/reward_classifier.py
@@ -12,6 +12,7 @@
 from serl_launcher.common.encoding import EncodingWrapper
 from flax.core.frozen_dict import freeze, unfreeze
 
+
 class BinaryClassifier(nn.Module):
     encoder_def: nn.Module
     hidden_dim: int = 256