diff --git a/tardis/plasma/standard_plasmas.py b/tardis/plasma/standard_plasmas.py
index 378bc45b66b..5a4d269cbc8 100644
--- a/tardis/plasma/standard_plasmas.py
+++ b/tardis/plasma/standard_plasmas.py
@@ -93,7 +93,7 @@ def assemble_plasma(config, model, atom_data=None):
                 e,
                 "Error might be from the use of an old-format of the atomic database, \n"
                 "please see https://github.com/tardis-sn/tardis-refdata/tree/master/atom_data"
-                ",for the most recent version.",
+                " for the most recent version.",
             )
             raise