diff --git a/setup.cfg b/setup.cfg
index 9177986e..fd82739f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -27,7 +27,7 @@ install_requires =
     cachetools~=4.1
     debts~=0.5
     email_validator~=1.0
-    Flask-Babel~=1.0
+    Flask-Babel>=1,<3
     Flask-Cors~=3.0
     Flask-Mail~=0.9
     Flask-Migrate>=2.5.3,<3  # Not following semantic versioning (e.g. https://github.com/miguelgrinberg/flask-migrate/commit/1af28ba273de6c88544623b8dc02dd539340294b)