diff --git a/doc/UsersGuide/source/requirements.txt b/doc/UsersGuide/source/requirements.txt
index 5a2c44ab58b..541c0f294f3 100644
--- a/doc/UsersGuide/source/requirements.txt
+++ b/doc/UsersGuide/source/requirements.txt
@@ -2,7 +2,7 @@ bibtexparser
 gitpython
 natsort
 sphinx
-sphinxcontrib-bibtex
+sphinxcontrib-bibtex<2.0.0
 sphinxcontrib-inlinesyntaxhighlight
 sphinxcontrib-programoutput
 ompython