diff --git a/pufferlib/config/atari.ini b/pufferlib/config/atari.ini
index 75d1557ab..be9b54e1d 100644
--- a/pufferlib/config/atari.ini
+++ b/pufferlib/config/atari.ini
@@ -8,7 +8,7 @@ rnn_name = Recurrent
 
 [vec]
 num_envs = 128
-num_workers = 16
+num_workers = auto
 batch_size = 64
 
 [train]
diff --git a/pufferlib/environments/atari/environment.py b/pufferlib/environments/atari/environment.py
index 92295ecaa..6af5c5457 100644
--- a/pufferlib/environments/atari/environment.py
+++ b/pufferlib/environments/atari/environment.py
@@ -16,7 +16,7 @@ def make(name, obs_type='grayscale', frameskip=4,
         repeat_action_probability=0.0, render_mode='rgb_array',
         buf=None, seed=0):
     '''Atari creation function'''
-    pufferlib.environments.try_import('ale_py', 'AtariEnv')
+    pufferlib.environments.try_import('ale_py')
 
     ale_render_mode = render_mode
     if render_mode == 'human':
diff --git a/pufferlib/vector.py b/pufferlib/vector.py
index 78614f4d6..393237964 100644
--- a/pufferlib/vector.py
+++ b/pufferlib/vector.py
@@ -640,7 +640,8 @@ def make(env_creator_or_creators, env_args=None, env_kwargs=None, backend=Puffer
 
     if 'num_workers' in kwargs:
         if kwargs['num_workers'] == 'auto':
-            kwargs['num_workers'] = num_envs
+		import psutil
+		kwargs['num_workers'] = min(psutil.cpu_count(logical=False), num_envs)
 
         # TODO: None?
         envs_per_worker = num_envs / kwargs['num_workers']
diff --git a/pyproject.toml b/pyproject.toml
index 797707449..e6562b16b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,7 @@ avalon = [
 atari = [
     'gymnasium[accept-rom-license]==0.29.1',
     'opencv-python==3.4.17.63',
-    'ale_py==0.9.0',
+    'ale_py==0.10.1',
 ]
 
 box2d = [