diff --git a/baselines/common/vec_env/dummy_vec_env.py b/baselines/common/vec_env/dummy_vec_env.py
index af60f76..3fbb8e1 100644
--- a/baselines/common/vec_env/dummy_vec_env.py
+++ b/baselines/common/vec_env/dummy_vec_env.py
@@ -64,5 +64,5 @@ class DummyVecEnv(VecEnv):
         return dict_to_obs(copy_obs_dict(self.buf_obs))
 
     def get_images(self):
-        return [env.render(mode='rgb') for env in self.envs]
+        return [env.render(mode='rgb_array') for env in self.envs]