diff --git a/tox.ini b/tox.ini
index e1f0a0e..a6e32e4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,6 +21,7 @@ deps =
     django-tables2~=2.4
     djangorestframework~=3.14
     django-rest-polymorphic~=0.1
+    odfpy~=1.4.1
     phonenumbers~=8.12.57
     pypdf~=3.4
     python-magic~=0.4.26