diff --git a/camelot/parsers/lattice.py b/camelot/parsers/lattice.py
index 9687ee8..c897d69 100644
--- a/camelot/parsers/lattice.py
+++ b/camelot/parsers/lattice.py
@@ -145,7 +145,7 @@ class Lattice(BaseParser):
                     warnings.warn(
                         "'ghostscript' will be replaced by 'poppler' as the default image conversion"
                         " backend in v0.12.0. You can try out 'poppler' with backend='poppler'.",
-                        DeprecationWarning
+                        DeprecationWarning,
                     )
 
                 return BACKENDS[backend]()