diff --git a/bin/Modules/Ensembl/ActivityCategorizer.py b/bin/Modules/Ensembl/ActivityCategorizer.py
index e29ac4b..d8dfa42 100644
--- a/bin/Modules/Ensembl/ActivityCategorizer.py
+++ b/bin/Modules/Ensembl/ActivityCategorizer.py
@@ -33,8 +33,8 @@ def read_config(self, organism, wd):
 
         c_dict = {}
         path_to_config = os.path.join(wd, "../config/celltypes_"+organism+".json")
-        with open(path_to_config) as input:
-            data = json.loads(input.read())
+        with open(path_to_config) as input_file:
+            data = json.loads(input_file.read())
             for x in data:
                 c_dict[x["type"]] = x["alias_ensembl"]
                 self.folderlist.extend(x["alias_ensembl"])