diff --git a/linked_lists/delete_mid/delete_mid_solution.ipynb b/linked_lists/delete_mid/delete_mid_solution.ipynb
index 027c32e..71c7427 100644
--- a/linked_lists/delete_mid/delete_mid_solution.ipynb
+++ b/linked_lists/delete_mid/delete_mid_solution.ipynb
@@ -100,13 +100,12 @@
     "            return\n",
     "        if node is None:\n",
     "            return\n",
-    "        node_next = node.next\n",
-    "        if node_next is None:\n",
+    "        if node.next is None:\n",
     "            node.data = None\n",
     "            node.next = None\n",
     "        else:\n",
-    "            node.data = node_next.data\n",
-    "            node.next = node_next.next"
+    "            node.data = node.next.data\n",
+    "            node.next = node.next.next"
    ]
   },
   {
@@ -196,21 +195,21 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "pygments_lexer": "ipython3",
+   "version": "3.4.3"
   }
  },
  "nbformat": 4,