diff --git a/tox.ini b/tox.ini
index 11358c5..e9b50e3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,9 +8,11 @@ deps=
     coverage
     pylint
     semver
+    pydocstyle
 commands=
     pep8 trezor_agent
     pylint --reports=no --rcfile .pylintrc trezor_agent
+    pydocstyle trezor_agent
     coverage run --omit='trezor_agent/__main__.py' --source trezor_agent -m py.test -v trezor_agent
     coverage report
     coverage html