diff --git a/requirements.txt b/requirements.txt
index 24f3f393..2a34c105 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ alembic==1.12.0
 passlib[bcrypt]==1.7.4
 python-jose==3.3.0
 email-validator==2.0.0.post2
-watchfiles==0.21.0
+watchfiles==0.20.0  # v0.20.0 is the last to support Python 3.7
 zstandard==0.21.0
 platformdirs==3.11.0
 importlib-resources>=1.3; python_version <= '3.9'