diff --git a/baselines/common/vec_env/dummy_vec_env.py b/baselines/common/vec_env/dummy_vec_env.py
index af7f3d6..7a77a5a 100644
--- a/baselines/common/vec_env/dummy_vec_env.py
+++ b/baselines/common/vec_env/dummy_vec_env.py
@@ -1,6 +1,5 @@
 import numpy as np
 from gym import spaces
-from collections import OrderedDict
 from . import VecEnv
 from .util import copy_obs_dict, dict_to_obs, obs_space_info