diff --git a/demos/simple_tracker.ipynb b/demos/simple_tracker.ipynb
index 7287320..f9b3598 100644
--- a/demos/simple_tracker.ipynb
+++ b/demos/simple_tracker.ipynb
@@ -120,7 +120,7 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "single_proc: [<SimCAD.configuration.Configuration object at 0x104ba30f0>]\n"
+      "single_proc: [<SimCAD.configuration.Configuration object at 0x102f32fd0>]\n"
      ]
     }
    ],
@@ -179,7 +179,6 @@
    "source": [
     "%matplotlib inline\n",
     "import pandas as pd\n",
-    "from tabulate import tabulate\n",
     "df = pd.DataFrame(raw_result)\n",
     "df.plot('timestamp', 'signal')\n",
     "df['signal'].describe()"
@@ -313,7 +312,7 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "single_proc: [<SimCAD.configuration.Configuration object at 0x1080d0978>]\n"
+      "single_proc: [<SimCAD.configuration.Configuration object at 0x106486c18>]\n"
      ]
     }
    ],
@@ -443,7 +442,6 @@
    "source": [
     "%matplotlib inline\n",
     "import pandas as pd\n",
-    "from tabulate import tabulate\n",
     "df = pd.DataFrame(raw_result)\n",
     "df.plot('timestamp', ['signal','follow'])\n",
     "df[['signal','follow']].describe()"
@@ -466,7 +464,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.0"
+   "version": "3.6.5"
   }
  },
  "nbformat": 4,