diff --git a/requirements.txt b/requirements.txt
index 2968b6c..9205ad4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 sphinx==4.0.2
 sphinx-rtd-theme==0.5.2
 sphinxcontrib-httpdomain==1.7.0
-sphinxcontrib-bibtex==2.3.0
+sphinxcontrib-bibtex==2.5.0