1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index d4352d303..c865d2e0c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ skipsdist = true
 basepython = python3
 deps = -r{toxinidir}/etc/requirements.txt
 commands =
-    sphinx-build -b html -n -d {envtmpdir}/doctrees ./docs/ {toxinidir}/docs/_build/html
+    sphinx-build -W -b html -n -d {envtmpdir}/doctrees ./docs/ {toxinidir}/docs/_build/html
     echo "Generated docs available in {toxinidir}/docs/_build/html"
 whitelist_externals =
     echo