diff --git a/units/en/unitbonus3/envs-to-try.mdx b/units/en/unitbonus3/envs-to-try.mdx
index 3e33ccc..2d10c81 100644
--- a/units/en/unitbonus3/envs-to-try.mdx
+++ b/units/en/unitbonus3/envs-to-try.mdx
@@ -4,7 +4,7 @@ Here we provide a list of interesting environments you can try to train your age
## DIAMBRA Arena
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+
DIAMBRA Arena is a software package featuring a collection of high-quality environments for Reinforcement Learning research and experimentation. It provides a standard interface to popular arcade emulated video games, offering a Python API fully compliant with OpenAI Gym/Gymnasium format, that makes its adoption smooth and straightforward.