diff --git a/notebooks/unit8/unit8_part2.ipynb b/notebooks/unit8/unit8_part2.ipynb
index b36924a..51819df 100644
--- a/notebooks/unit8/unit8_part2.ipynb
+++ b/notebooks/unit8/unit8_part2.ipynb
@@ -7,7 +7,7 @@
         "colab_type": "text"
       },
       "source": [
-        "<a href=\"https://colab.research.google.com/github/huggingface/deep-rl-class/blob/EdBeeching%2FPPOPart2/notebooks/unit8/unit8_part2.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+        "<a href=\"https://colab.research.google.com/github/huggingface/deep-rl-class/blob/main/notebooks/unit8/unit8_part2.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
       ]
     },
     {
@@ -243,7 +243,9 @@
       "outputs": [],
       "source": [
         "# install python libraries\n",
-        "!pip install sample-factory\n",
+        "# thanks toinsson\n",
+        "!pip install sample-factory==2.0.2\n",
+        "!pip install faster-fifo==1.4.2\n",
         "!pip install vizdoom"
       ]
     },