diff --git a/server/text_generation_server/utils/logits_process.py b/server/text_generation_server/utils/logits_process.py
index 8cf85c9f..6b915437 100644
--- a/server/text_generation_server/utils/logits_process.py
+++ b/server/text_generation_server/utils/logits_process.py
@@ -146,7 +146,6 @@ class FrequencyPenaltyLogitsProcessor(LogitsProcessor):
         # set score to 0 where input_ids is a padding token
         score *= input_ids.ne(0)
 
-
         return scores.scatter_add_(1, input_ids, score)
 
 
@@ -172,7 +171,9 @@ class HeterogeneousFrequencyPenaltyLogitsProcessor(LogitsProcessor):
 
         # Calculate the frequency for each token so far
         token_freq = torch.zeros(batch_size, vocab_size, device=input_ids.device)
-        token_freq.scatter_add_(1, input_ids, torch.ones_like(input_ids, dtype=torch.float))
+        token_freq.scatter_add_(
+            1, input_ids, torch.ones_like(input_ids, dtype=torch.float)
+        )
         token_freq /= input_size
 
         # Apply the frequency penalty to logits