diff --git a/requirements.txt b/requirements.txt
index fdc4a6b8..3de947dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,4 +15,4 @@ pytest-cov==1.8.1
 scipy==0.17.0
 six==1.8.0
 -e git+https://github.com/micropsi-industries/spock.git#egg=spock-dev
-waitress==0.8.9
+waitress==2.1.1