diff --git a/slideatlas/plugins/ipython/requirements.txt b/slideatlas/plugins/ipython/requirements.txt
index e8803a55..923dbc42 100644
--- a/slideatlas/plugins/ipython/requirements.txt
+++ b/slideatlas/plugins/ipython/requirements.txt
@@ -11,6 +11,6 @@ ipython==2.3.1
 pyzmq==14.5.0
 requests==2.2.1
 six==1.5.2
-tornado==4.0.2
+tornado==6.5
 urllib3==1.7.1
 wsgiref==0.1.2