diff --git a/ensemble_md/utils/exceptions.py b/ensemble_md/utils/exceptions.py
index 9cba496..9d00c97 100644
--- a/ensemble_md/utils/exceptions.py
+++ b/ensemble_md/utils/exceptions.py
@@ -8,6 +8,7 @@
 #                                                                  #
 ####################################################################
 
+
 class ParameterError(Exception):
     """Error raised when detecting improperly specified parameters in the YAML file."""