diff --git a/README.md b/README.md
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@@ -27,4 +27,5 @@ $ pip install -e .
   - [`clang-tidy`](https://clang.llvm.org/extra/clang-tidy/) Can be configured to a variety of code styles.
 
 # Day 3 Resources
-- *Python Typing is for Humans*: [Unital.dev blog](https://www.unital.dev/blog/python-typing-is-for-humans/) or [LinkedIn](https://www.linkedin.com/pulse/python-typing-humans-corran-webster-u66ee)
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+- *Python Typing is for Humans*: [Unital.dev blog](https://www.unital.dev/blog/python-typing-is-for-humans/) or [LinkedIn](https://www.linkedin.com/pulse/python-typing-humans-corran-webster-u66ee)
+- [PyData Sphinx Theme](https://pydata-sphinx-theme.readthedocs.io/en/stable/)
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