diff --git a/coding/flask-docker/requirements.txt b/coding/flask-docker/requirements.txt
index 06153b3..a2b17bf 100644
--- a/coding/flask-docker/requirements.txt
+++ b/coding/flask-docker/requirements.txt
@@ -1,2 +1,2 @@
 Flask==1.0.2
-waitress==1.4.0
+waitress==1.4.2