diff --git a/paper/paper.bib b/paper/paper.bib
index e0cc4d1b..f8aabaf2 100644
--- a/paper/paper.bib
+++ b/paper/paper.bib
@@ -65,7 +65,7 @@ @Article{         harris2020array
  url           = {https://doi.org/10.1038/s41586-020-2649-2}
 }
 
-@misc{heins2022pymdp_arxiv},
+@misc{heins2022pymdp_arxiv,
     title={pymdp: A Python library for active inference in discrete state spaces},
     author={Heins, Conor and Millidge, Beren and Demekas, Daphne and Klein, Brennan and Friston, Karl and Couzin, Iain and Tschantz, Alexander},
     eprint={2201.03904v1},