diff --git a/lerobot/common/tdmpc.py b/lerobot/common/tdmpc.py
index 03aeb7d70..de4543dba 100644
--- a/lerobot/common/tdmpc.py
+++ b/lerobot/common/tdmpc.py
@@ -128,10 +128,7 @@ class TDMPC(nn.Module):
     def act(self, obs, t0=False, step=None):
         """Take an action. Uses either MPC or the learned policy, depending on the self.cfg.mpc flag."""
         if isinstance(obs, dict):
-            obs = {
-                k: o.detach().unsqueeze(0)
-                for k, o in obs.items()
-            }
+            obs = {k: o.detach().unsqueeze(0) for k, o in obs.items()}
         else:
             obs = obs.detach().unsqueeze(0)
         z = self.model.encode(obs)