diff --git a/docs/requirements.txt b/docs/requirements.txt
index c591f08491..99a7811de6 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,4 @@
-sphinx
+sphinx==2.4.4
 -e git+git://github.com/pytorch/pytorch_sphinx_theme.git#egg=pytorch_sphinx_theme
 sphinxcontrib.katex
 matplotlib