diff --git a/notebooks/unit3/unit3.ipynb b/notebooks/unit3/unit3.ipynb
index f9eee5e..6b9378d 100644
--- a/notebooks/unit3/unit3.ipynb
+++ b/notebooks/unit3/unit3.ipynb
@@ -277,7 +277,6 @@
       "source": [
         "%%capture\n",
         "!apt install python-opengl\n",
-        "!apt install ffmpeg\n",
         "!apt install xvfb\n",
         "!pip3 install pyvirtualdisplay"
       ]
@@ -317,7 +316,7 @@
         "    - stable_baselines3.common.atari_wrappers.AtariWrapper\n",
         "  frame_stack: 4\n",
         "  policy: 'CnnPolicy'\n",
-        "  n_timesteps: !!float 1e7\n",
+        "  n_timesteps: !!float 1e6\n",
         "  buffer_size: 100000\n",
         "  learning_rate: !!float 1e-4\n",
         "  batch_size: 32\n",
@@ -830,4 +829,4 @@
   },
   "nbformat": 4,
   "nbformat_minor": 0
-}
\ No newline at end of file
+}