diff --git a/README.md b/README.md
index 6ce6896..aea18c7 100644
--- a/README.md
+++ b/README.md
@@ -457,7 +457,7 @@ for usage in production environments.
 - [ ] Find and implement a way to mitigate the [UNSAFE_DEPENDENCIES issue](https://github.com/python-poetry/poetry/issues/1584) in Poetry.
       ([#6](https://github.com/enpaul/tox-poetry-installer/issues/6))
 - [ ] Fix logging to make proper use of Tox's logging reporter infrastructure ([#3](https://github.com/enpaul/tox-poetry-installer/issues/3))
-- [ ] Add configuration option for installing all dev-dependencies to a testenv ([#14](https://github.com/enpaul/tox-poetry-installer/issues/14))
+- [X] Add configuration option for installing all dev-dependencies to a testenv ([#14](https://github.com/enpaul/tox-poetry-installer/issues/14))
 
 ### Path to Stable