diff --git a/tox.ini b/tox.ini
index a34ad63..ff5df36 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,6 +13,7 @@
 
 [testenv:docs]
 deps =
+    pyenchant
     sphinx
     sphinxcontrib-spelling
     sphinx_rtd_theme