diff --git a/examples/demo.py b/examples/demo.py
index 6c02f3552da2fe64f46a251bb17c7ac95709967a..54d7931abef398af1268501f4b99c7fc9f1a701f 100644
--- a/examples/demo.py
+++ b/examples/demo.py
@@ -140,7 +140,7 @@ class Demo:
             # Action
             for iAgent in range(self.env.get_num_agents()):
                 action = 2
-                agent = self.env.agents.copy()[iAgent]
+                agent = self.env.agents.[iAgent]
                 if not self.env.check_action(agent, action)[1]:
                    action = np.random.choice(self.action_size)
                 action_dict.update({iAgent: action})