diff --git a/fancy_gym/envs/mujoco/box_pushing/box_pushing_env.py b/fancy_gym/envs/mujoco/box_pushing/box_pushing_env.py
index 275bba1..2408404 100644
--- a/fancy_gym/envs/mujoco/box_pushing/box_pushing_env.py
+++ b/fancy_gym/envs/mujoco/box_pushing/box_pushing_env.py
@@ -13,6 +13,7 @@ MAX_EPISODE_STEPS_BOX_PUSHING = 100
 
 BOX_POS_BOUND = np.array([[0.3, -0.45, -0.01], [0.6, 0.45, -0.01]])
 
+
 class BoxPushingEnvBase(MujocoEnv, utils.EzPickle):
     """
     franka box pushing environment
@@ -41,8 +42,7 @@ class BoxPushingEnvBase(MujocoEnv, utils.EzPickle):
         self._episode_energy = 0.
         MujocoEnv.__init__(self,
                            model_path=os.path.join(os.path.dirname(__file__), "assets", "box_pushing.xml"),
-                           frame_skip=self.frame_skip,
-                           mujoco_bindings="mujoco")
+                           frame_skip=self.frame_skip)
         self.action_space = spaces.Box(low=-1, high=1, shape=(7,))
 
     def step(self, action):
@@ -246,7 +246,7 @@ class BoxPushingEnvBase(MujocoEnv, utils.EzPickle):
 
             old_err_norm = err_norm
 
-            ### get Jacobian by mujoco
+            # get Jacobian by mujoco
             self.data.qpos[:7] = q
             mujoco.mj_forward(self.model, self.data)
 
@@ -280,6 +280,7 @@ class BoxPushingEnvBase(MujocoEnv, utils.EzPickle):
 
         return q
 
+
 class BoxPushingDense(BoxPushingEnvBase):
     def __init__(self, frame_skip: int = 10):
         super(BoxPushingDense, self).__init__(frame_skip=frame_skip)
@@ -295,7 +296,7 @@ class BoxPushingDense(BoxPushingEnvBase):
         energy_cost = -0.0005 * np.sum(np.square(action))
 
         reward = joint_penalty + tcp_box_dist_reward + \
-                 box_goal_pos_dist_reward + box_goal_rot_dist_reward + energy_cost
+            box_goal_pos_dist_reward + box_goal_rot_dist_reward + energy_cost
 
         rod_inclined_angle = rotation_distance(rod_quat, self._desired_rod_quat)
         if rod_inclined_angle > np.pi / 4:
@@ -303,6 +304,7 @@ class BoxPushingDense(BoxPushingEnvBase):
 
         return reward
 
+
 class BoxPushingTemporalSparse(BoxPushingEnvBase):
     def __init__(self, frame_skip: int = 10):
         super(BoxPushingTemporalSparse, self).__init__(frame_skip=frame_skip)
@@ -331,6 +333,7 @@ class BoxPushingTemporalSparse(BoxPushingEnvBase):
 
         return reward
 
+
 class BoxPushingTemporalSpatialSparse(BoxPushingEnvBase):
 
     def __init__(self, frame_skip: int = 10):