diff --git a/README.md b/README.md
index 4f20b6e..458542b 100644
--- a/README.md
+++ b/README.md
@@ -92,7 +92,7 @@ Prediction is sampled after 110K iterations and I only implemented one-step trai
 * Open AI gym
 * [Roboschool](https://github.com/openai/roboschool) (Optional)
 * PyTorch v0.3.0
-* Python 2.7 or Python 3.6
+* Python 2.7 
 * [TensorboardX](https://github.com/lanpa/tensorboard-pytorch)
 
 
diff --git a/main.py b/main.py
index 947d3ed..8e54501 100644
--- a/main.py
+++ b/main.py
@@ -333,8 +333,8 @@ if __name__ == '__main__':
 
     # dqn_pixel_atari('PongNoFrameskip-v4')
     # async_pixel_atari('PongNoFrameskip-v4')
-    # a3c_pixel_atari('PongNoFrameskip-v4')
-    a2c_pixel_atari('PongNoFrameskip-v4')
+    a3c_pixel_atari('PongNoFrameskip-v4')
+    # a2c_pixel_atari('PongNoFrameskip-v4')
 
     # dqn_pixel_atari('BreakoutNoFrameskip-v4')
     # async_pixel_atari('BreakoutNoFrameskip-v4')