diff --git a/requirements.txt b/requirements.txt
index 653138d..edf65df 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,5 +37,5 @@ urllib3==1.22
 virtualenv==15.1.0
 virtualenv-clone==0.2.6
 virtualenvwrapper==4.8.2
-waitress==1.0.2
+waitress==2.1.1
 whitenoise==3.3.0