diff --git a/md_pdf/config/validate.py b/md_pdf/config/validate.py
index edc3569..299bb1d 100644
--- a/md_pdf/config/validate.py
+++ b/md_pdf/config/validate.py
@@ -41,7 +41,6 @@ def test_input(config):
             raise ConfigValidationException("Input must be a glob of files")
 
 
-
 def validate_bibliography(config):
     if 'bibliography' not in config:
         return