diff --git a/python/tox.ini b/python/tox.ini
index ea4c35b1f..bc320b879 100644
--- a/python/tox.ini
+++ b/python/tox.ini
@@ -46,7 +46,7 @@ deps =
 commands =
     ruff format --diff setup.py src/deltachat examples/ tests/
     ruff check src/deltachat tests/ examples/
-    rst-lint --encoding 'utf-8' README.rst
+    rst-lint README.rst
 
 [testenv:mypy]
 deps =