diff --git a/requirements.txt b/requirements.txt
index 88fbe09..49390cc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ MarkupSafe==0.23
 PasteDeploy==1.5.2
 PyYAML==3.11
 Pygments==2.0.2
-Sphinx==1.3.1
+Sphinx==3.0.4
 WebOb==1.4.1
 WebTest==2.0.18
 beautifulsoup4==4.3.2