diff --git a/tox.ini b/tox.ini
index bef2e6a..e64f108 100644
--- a/tox.ini
+++ b/tox.ini
@@ -39,6 +39,6 @@ deps =
     pygments
 commands =
     mkdir -p var/docs
-	rst2html.py --exit-status=2 README.rst var/docs/README.html
+    rst2html.py --exit-status=2 README.rst var/docs/README.html
 whitelist_externals =
     mkdir