diff --git a/requirements.txt b/requirements.txt
index 52c38d5..a49abde 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 setuptools==46.1.3
-waitress==1.4.3
+waitress==2.1.1
 wheel==0.34.2
 dash_renderer==1.2.4
 dash_core_components==1.8.1