diff --git a/doc/requirements.txt b/doc/requirements.txt
index a78a8086..4bd13474 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,5 +1,5 @@
-sphinx==3.4.3
+sphinx<6.0.0
 sphinx-rtd-theme>=0.5.2
 docutils>=0.14,<0.18
-Jinja2<3.1
 urllib3<2
+jinja2<3.10