diff --git a/samples/bookinfo/src/productpage/requirements.txt b/samples/bookinfo/src/productpage/requirements.txt
index c1968c8dd0c..86005c9ac10 100644
--- a/samples/bookinfo/src/productpage/requirements.txt
+++ b/samples/bookinfo/src/productpage/requirements.txt
@@ -24,7 +24,7 @@ simplejson==3.16.0
 six==1.12.0
 threadloop==1.0.2
 thrift==0.11.0
-tornado==4.5.3
+tornado==6.4.2
 urllib3==1.24.2
 visitor==0.1.3
 Werkzeug==0.15.5