diff --git a/pyproject.toml b/pyproject.toml
index a513366..14ade6c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -98,7 +98,7 @@ dev = [
     "flake8>=5.0.4",
     "uvicorn[standard] >=0.19.0",
     "pre-commit>=2.17.0,<4.0.0",
-    "watchfiles>=0.16.1,<0.21.0",
+    "watchfiles>=0.16.1,<0.22.0",
 ]
 
 doc = [