diff --git a/largegraph/gs_srl/requirements.txt b/largegraph/gs_srl/requirements.txt
index b9e23dc..e7d5f56 100644
--- a/largegraph/gs_srl/requirements.txt
+++ b/largegraph/gs_srl/requirements.txt
@@ -16,5 +16,5 @@ singledispatch==3.4.0.3
 six==1.12.0
 snakeviz==2.0.1
 subprocess32==3.5.4
-tornado==5.1.1
+tornado==6.3.3
 XlsxWriter==1.1.8