diff --git a/premise_gwp/__init__.py b/premise_gwp/__init__.py
index bc23cc2..d45c530 100644
--- a/premise_gwp/__init__.py
+++ b/premise_gwp/__init__.py
@@ -18,9 +18,6 @@ def add_premise_gwp():
     check_biosphere_database()
     bw2io_version = check_biosphere_version()
 
-
-
-
     # impact methods to create
     categories_bw2io087 = {
         (
@@ -76,7 +73,9 @@ def add_premise_gwp():
         ),
     }
 
-    categories = categories_bw2io088 if bw2io_version >= (0, 8, 8) else categories_bw2io087
+    categories = (
+        categories_bw2io088 if bw2io_version >= (0, 8, 8) else categories_bw2io087
+    )
 
     for c in categories:
         print("Adding {}".format(c[0]))
diff --git a/premise_gwp/biosphere.py b/premise_gwp/biosphere.py
index d51a3ab..0ecb7a6 100644
--- a/premise_gwp/biosphere.py
+++ b/premise_gwp/biosphere.py
@@ -5,6 +5,7 @@ def check_biosphere_database():
     ERROR = "IPCC LCIA methods for ecoinvent biosphere flows only; install base ecoinvent data"
     assert "biosphere3" in bd.databases, ERROR
 
+
 def check_biosphere_version() -> tuple:
     # check for the presence of Beryllium II
     if "Beryllium II" not in [f["name"] for f in bd.Database("biosphere3")]: