diff --git a/requirements.txt b/requirements.txt
index affe212..588d367 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,6 +44,6 @@ soupsieve==2.2.1
 traitlets==5.1.0
 typing-extensions==3.10.0.2
 urllib3==1.26.7
-Werkzeug==2.0.2
+Werkzeug==0.15.5
 xlrd==1.1.0
 zipp==3.6.0