From a06ac6db4816908209294bbd2144551e0a7cdc9c Mon Sep 17 00:00:00 2001
From: Kallinteris Andreas
 <30759571+Kallinteris-Andreas@users.noreply.github.com>
Date: Fri, 10 Nov 2023 17:49:06 +0200
Subject: [PATCH] Update mujoco_env.py

---
 gymnasium/envs/mujoco/mujoco_env.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gymnasium/envs/mujoco/mujoco_env.py b/gymnasium/envs/mujoco/mujoco_env.py
index 1c1a986fe..956fda093 100644
--- a/gymnasium/envs/mujoco/mujoco_env.py
+++ b/gymnasium/envs/mujoco/mujoco_env.py
@@ -329,6 +329,7 @@ def _get_viewer(
 
     def close(self):
         if self.viewer is not None:
+            self.viewer.free()
             self.viewer = None
             self._viewers = {}