diff --git a/linked_lists/find_loop_start/find_loop_start_challenge.ipynb b/linked_lists/find_loop_start/find_loop_start_challenge.ipynb
index d6065fa..11073e9 100644
--- a/linked_lists/find_loop_start/find_loop_start_challenge.ipynb
+++ b/linked_lists/find_loop_start/find_loop_start_challenge.ipynb
@@ -186,21 +186,21 @@
  ],
  "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": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/linked_lists/find_loop_start/find_loop_start_solution.ipynb b/linked_lists/find_loop_start/find_loop_start_solution.ipynb
index 102d927..5bdf2ec 100644
--- a/linked_lists/find_loop_start/find_loop_start_solution.ipynb
+++ b/linked_lists/find_loop_start/find_loop_start_solution.ipynb
@@ -111,10 +111,10 @@
     "            fast = fast.next.next\n",
     "            if fast is None:\n",
     "                return None\n",
-    "            if slow.data == fast.data:\n",
+    "            if slow == fast:\n",
     "                break\n",
     "        slow = self.head\n",
-    "        while slow.data != fast.data:\n",
+    "        while slow != fast:\n",
     "            slow = slow.next\n",
     "            fast = fast.next\n",
     "            if fast is None:\n",
@@ -238,7 +238,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.4.3"
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,