diff --git a/simpletransformers/custom_models/models.py b/simpletransformers/custom_models/models.py
index 52cbf85c..5e342e64 100755
--- a/simpletransformers/custom_models/models.py
+++ b/simpletransformers/custom_models/models.py
@@ -14,6 +14,7 @@
     XLNetModel,
     XLNetPreTrainedModel,
 )
+
 from transformers.configuration_camembert import CamembertConfig
 from transformers.configuration_distilbert import DistilBertConfig
 from transformers.configuration_roberta import RobertaConfig