Update environments.md
diff --git a/docs/environments.md b/docs/environments.md
index e607a1363c6..80721414b76 100644
--- a/docs/environments.md
+++ b/docs/environments.md
@@ -424,6 +424,6 @@ Learn more here: https://github.com/dynamik1703/gym_longicontrol
 
 ### safe-control-gym
 
-PyBullet-based CartPole and Quadrotor environments—with [CadADi](https://web.casadi.org) (symbolic) *a priori* dynamics and constraints—for learning-based control and model-based reinforcement learning.
+PyBullet-based CartPole and Quadrotor environments—with [CasADi](https://web.casadi.org) (symbolic) *a priori* dynamics and constraints—for learning-based control and model-based reinforcement learning.
 
 Learn more here: https://github.com/utiasDSL/safe-control-gym

I'm so sorry I mistyped the name of the fantastic CasADi optimization toolbox (https://web.casadi.org)