diff --git a/docs/environments/third_party_environments.md b/docs/environments/third_party_environments.md
index ce45cb0ad..691648f7e 100644
--- a/docs/environments/third_party_environments.md
+++ b/docs/environments/third_party_environments.md
@@ -87,7 +87,7 @@ An environment for guiding automated theorem provers based on saturation algorit
 
 An environment to easily implement discrete MDPs as gym environments. Turn a set of matrices (`P_0(s)`, `P(s'| s, a)` and `R(s', s, a)`) into a gym environment that represents the discrete MDP ruled by these dynamics.
 
-# Third-Party Environments using Gym
+## Third-Party Environments using Gym
 
 There are a large number of third-party environments using various versions of [Gym](https://github.com/openai/gym).
 Many of these can be adapted to work with gymnasium (see [Compatibility with Gym](https://gymnasium.farama.org/content/gym_compatibility/)), but are not guaranteed to be fully functional.