diff --git a/requirements.txt b/requirements.txt
index ada11ae..9c597cb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ pyramid==1.8.1
 pyramid-beaker==0.8
 pyramid-mako==1.0.2
 Unidecode==0.4.19
-waitress==1.4.3
+waitress==2.1.1
 bcrypt==3.1.3
 python-slugify==1.2.1
 psycopg2==2.7.3
\ No newline at end of file