diff --git a/tox.ini b/tox.ini
index 40e6b08..68f431b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -36,6 +36,7 @@ deps =
     gadjo
     Quixote>=3.0,<3.2
     django>=2.2,<2.3
+    unidecode
     pre-commit
 commands =
     ./get_wcs.sh