diff --git a/pyproject.toml b/pyproject.toml
index 77784ab1..12fb458e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ classifiers = [
     'Topic :: Scientific/Engineering :: Artificial Intelligence',
 ]
 dependencies = [
-    "mujoco>=2.2.0",
+    "mujoco>=2.2.0, <3.2.0",
     "numpy>=1.21.0",
     "gymnasium>=1.0.0a2",
     "PettingZoo>=1.23.0",