diff --git a/pyproject.toml b/pyproject.toml
index 7c507aada5..38530697c3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -78,6 +78,7 @@ dependencies = [
   "Jinja2 < 3.1",
   "tzdata >= 2022.6",
   "pydantic < 2.0",
+  "unidecode <= 1.3.8",
   # for unit tests and code formatting
   "mock >= 4.0.3",
   "model_mommy >= 2.0",