diff --git a/requirements-dev.txt b/requirements-dev.txt
index 501347a..af48d4d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -20,6 +20,6 @@ pyquery==1.3.0
 PyYAML==5.4.1
 six==1.16.0
 sqlparse==0.4.2
-waitress==2.0.0
+waitress==2.1.1
 WebOb==1.8.7
 WebTest==3.0.0