diff --git a/constraints.txt b/constraints.txt
index f952fe3bd4861674c2bc508f9a5bf8b2b4119aa5..67696ef28cc46e0f73107052b54ab50ff6ba6cad 100644
--- a/constraints.txt
+++ b/constraints.txt
@@ -52,6 +52,7 @@ types-setuptools==65.1.0
 types-SQLAlchemy==1.4.50
 types-urllib3==1.26.23
 typing-extensions==4.3.0
+Unidecode==1.3.6
 urllib3==1.26.12
 uwsgidecorators==1.1.0
 visitor==0.1.3
diff --git a/setup.py b/setup.py
index 77e694f6268133fb1feb3b49e03a8dcbba227bd1..ac6d417d368322dc179220f263066286da4b5ff4 100644
--- a/setup.py
+++ b/setup.py
@@ -49,6 +49,7 @@ setuptools.setup(
         'requests',
         'sqlalchemy[mypy]',
         'token-bucket',
+        'unidecode',
         'uwsgidecorators',
         # Používáme pro vývoj, ale aby je pylsp našel, musí být ve stejném virtualenvu
         # jako ostatní knihovny.