diff --git a/requirements.txt b/requirements.txt
index 7c82d69..389e1e9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ MarkupSafe==0.23
 PasteDeploy==1.5.2
 PyYAML==4.2b1
 Pygments==2.7.4
-Sphinx==3.0.4
+Sphinx==3.3.0
 WebOb==1.6.0a0
 WebTest==2.0.18
 beautifulsoup4==4.3.2