diff --git a/bin/Modules/Ensembl/ActivityCategorizer.py b/bin/Modules/Ensembl/ActivityCategorizer.py
index d8dfa42..f1973c5 100644
--- a/bin/Modules/Ensembl/ActivityCategorizer.py
+++ b/bin/Modules/Ensembl/ActivityCategorizer.py
@@ -32,7 +32,7 @@ def get_categorization(self):
     def read_config(self, organism, wd):
 
         c_dict = {}
-        path_to_config = os.path.join(wd, "../config/celltypes_"+organism+".json")
+        path_to_config = os.path.join(wd, "/config/celltypes_"+organism+".json")
         with open(path_to_config) as input_file:
             data = json.loads(input_file.read())
             for x in data: