diff --git a/docs/requirements.txt b/docs/requirements.txt
index 6f2c99e..70a0fe4 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,4 @@
 Sphinx==4.0.2
 sphinxcontrib-httpdomain==1.7.0
 sphinx-rtd-theme==0.5.2
-sphinxcontrib-bibtex==2.3.0
+sphinxcontrib-bibtex==2.4.1