diff --git a/12_custom_models_and_training_with_tensorflow.ipynb b/12_custom_models_and_training_with_tensorflow.ipynb
index 12738f3..f87cc36 100644
--- a/12_custom_models_and_training_with_tensorflow.ipynb
+++ b/12_custom_models_and_training_with_tensorflow.ipynb
@@ -56,6 +56,7 @@
     "try:\n",
     "    # %tensorflow_version only exists in Colab.\n",
     "    %tensorflow_version 2.x\n",
+    "    !pip install -U tqdm\n",
     "except Exception:\n",
     "    pass\n",
     "\n",