diff --git a/misc/requirements/requirements-sphinx.txt b/misc/requirements/requirements-sphinx.txt
index 84029ab8b..fa9e595f3 100644
--- a/misc/requirements/requirements-sphinx.txt
+++ b/misc/requirements/requirements-sphinx.txt
@@ -12,7 +12,7 @@ MarkupSafe==1.1.0
 packaging==19.0
 Pygments==2.3.1
 pyparsing==2.3.1
-pytz==2018.7
+pytz==2018.9
 requests==2.21.0
 six==1.12.0
 snowballstemmer==1.2.1