diff --git a/poetry.lock b/poetry.lock
index dcc02891..e47b0200 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -3475,4 +3475,4 @@ testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "p
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10"
-content-hash = "f5251fd5ddf3f13fce8a8a0c14131a5ff3d1f433d030598b9e4cefdaaddbd4f8"
+content-hash = "99addbfc02bcd35a308f4ecc5b4285c9c5054118f4aadea27650d8bf355d9616"
diff --git a/pyproject.toml b/pyproject.toml
index e4b0d5d0..29cec3b7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ mpmath = "^1.3.0"
 torch = "^2.2.1"
 tensordict = {git = "https://github.com/pytorch/tensordict"}
 torchrl = {git = "https://github.com/pytorch/rl", rev = "13bef426dcfa5887c6e5034a6e9697993fa92c37"}
-mujoco = "2.3.7"
+mujoco = "^2.3.7"
 opencv-python = "^4.9.0.80"
 diffusers = "^0.26.3"
 torchvision = "^0.17.1"