diff --git a/science_requirements.txt b/science_requirements.txt
index a7d07bf4ba8..410600d1715 100644
--- a/science_requirements.txt
+++ b/science_requirements.txt
@@ -91,7 +91,7 @@ rope==0.18.0
 six==1.15.0
 snowballstemmer==2.0.0
 sortedcontainers==2.3.0
-Sphinx==3.4.2
+Sphinx==3.4.1
 sphinxcontrib-applehelp==1.0.2
 sphinxcontrib-devhelp==1.0.2
 sphinxcontrib-htmlhelp==1.0.3