diff --git a/requirements.txt b/requirements.txt
index 3447633..d764329 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,3 +41,4 @@ uvicorn>=0.11.8
 uvloop>=0.14.0
 websockets>=9.1
 zope.interface>=5.1.0
+shutils