diff --git a/requirements.txt b/requirements.txt
index 78132142b..e72801a10 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,12 +1,12 @@
 alabaster==0.7.7
-Babel==2.2.0
+Babel==2.9.1
 docutils==0.12
-Jinja2==2.8
+Jinja2==2.11.3
 MarkupSafe==0.23
-Pygments==2.1.1
+Pygments==2.7.4
 pytz==2015.7
 six==1.10.0
 snowballstemmer==1.2.1
-Sphinx==1.3.5
+Sphinx==3.0.4
 sphinx-rtd-theme==0.1.9
 wheel==0.29.0