diff --git a/docs/conf.py b/docs/conf.py
index 9d352c1..2eadc43 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -92,7 +92,8 @@
 master_doc = 'index'
 
 bibtex_bibfiles = ['refs.bib']
-bibtex_default_style = 'author_year'
+bibtex_default_style = 'plain'
+bibtex_reference_style = 'author_year'
 
 intersphinx_mapping = {
     'python': ('https://docs.python.org/3', None),