diff --git a/.units/unit1/glossary.mdx b/.units/unit1/glossary.mdx
index 92396ac..03d440e 100644
--- a/.units/unit1/glossary.mdx
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@@ -38,3 +38,14 @@ It implies that the action taken by our agent is conditional solely on the prese
 ### Value-based Methods:
 - Another approach to solving RL problems.
 - Here, instead of training a policy, we train a **value function** that maps each state to the expected value of being in that state.
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+Contributions are welcomed :hugs:
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+If you want to improve the course, you can [open a Pull Request.](https://github.com/huggingface/deep-rl-class/pulls)
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+This glossary was made possible thanks to:
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+- [@lucifermorningstar1305](https://github.com/lucifermorningstar1305)
+- [@daspartho](https://github.com/daspartho)
+- [@misza222](https://github.com/misza222)
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