diff --git a/Makefile b/Makefile
index 4406e785..c192ceae 100644
--- a/Makefile
+++ b/Makefile
@@ -138,7 +138,7 @@ install-dev-env: ## install libraries required to build images and run tests
 
 
 docs: ## build HTML documentation
-	sphinx-build docs/ docs/_build/
+	sphinx-build -W docs/ docs/_build/
 
 install-docs-env: ## install libraries required to build docs
 	@pip install -r requirements-docs.txt
diff --git a/docs/using/selecting.md b/docs/using/selecting.md
index 1d5ec441..6f432f1b 100644
--- a/docs/using/selecting.md
+++ b/docs/using/selecting.md
@@ -264,5 +264,9 @@ core images and link them below.
   `base-notebook` image.
   Try it on [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/knonm/kotlin-notebook/main)
 
+- [transformers_notebook](https://github.com/ToluClassics/transformers_notebook): Easily run JupyterLab Notebooks pre-installed with the
+  [Transformers Library](https://huggingface.co/docs/transformers/index)
+  and other popular NLP frameworks such as **Tensorflow**, **Keras**, **Jax** and **PyTorch** by running a Docker container.
+
 See the [contributing guide](../contributing/stacks.md) for information about how to create your own
 Jupyter Docker Stack.