diff --git a/icom/vrc_pymc3.ipynb b/icom/vrc_pymc3.ipynb
index 28d21b5..084f833 100644
--- a/icom/vrc_pymc3.ipynb
+++ b/icom/vrc_pymc3.ipynb
@@ -5,7 +5,7 @@
     "colab": {
       "name": "Untitled0.ipynb",
       "provenance": [],
-      "authorship_tag": "ABX9TyNNvmpE7E8VdovmsMoHFy9r",
+      "authorship_tag": "ABX9TyOEeeo1NoWPbYBZNaB3oJiI",
       "include_colab_link": true
     },
     "kernelspec": {
@@ -25,14 +25,26 @@
       ]
     },
     {
+      "cell_type": "markdown",
+      "metadata": {
+        "id": "YyEo45Z_eCTt"
+      },
+      "source": [
+        "This notebooks implements Variable Rate Coding model of response times using PPL tools (Pyro and PyMC3)."
+      ]
+    },
+    {
       "cell_type": "code",
       "metadata": {
         "id": "8C40rrzjENts"
       },
       "source": [
-        ""
+        "%%capture --no-display\n",
+        "!pip install numpyro\n",
+        "\n",
+        "import numpyro"
       ],
-      "execution_count": null,
+      "execution_count": 10,
       "outputs": []
     }
   ]