diff --git a/requirements.txt b/requirements.txt
index c2886a7fe..680bb220c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ pytz==2018.5
 requests==2.19.1
 six==1.11.0
 snowballstemmer==1.2.1
-Sphinx==1.7.6
+Sphinx==3.3.0
 sphinx-sitemap==0.3.1
 sphinxcontrib-websupport==1.1.0
 urllib3==1.23