diff --git a/Pyrado/pyrado/environments/mujoco/openai_half_cheetah.py b/Pyrado/pyrado/environments/mujoco/openai_half_cheetah.py
index dafceef2a33..088698c8fc1 100644
--- a/Pyrado/pyrado/environments/mujoco/openai_half_cheetah.py
+++ b/Pyrado/pyrado/environments/mujoco/openai_half_cheetah.py
@@ -29,9 +29,9 @@
 import os.path as osp
 from typing import Optional
 
+import mujoco
 import numpy as np
 from init_args_serializer import Serializable
-import mujoco
 
 import pyrado
 from pyrado.environments.mujoco.base import MujocoSimEnv