diff --git a/tox.ini b/tox.ini
index 7a69000c8..3d5c2fd56 100644
--- a/tox.ini
+++ b/tox.ini
@@ -148,6 +148,7 @@ deps =
     sphinx
     PyYAML
     regendoc>=0.6.1
+    dataclasses
 whitelist_externals =
     rm
     make