diff --git a/ProgrammingAssignment_1/model.ipynb b/ProgrammingAssignment_1/model.ipynb
index f00acf17254f35dd3ea3eec958fe3c710a83d956..b36d7551dcc7098e14ebe55479c420848578c3ed 100644
--- a/ProgrammingAssignment_1/model.ipynb
+++ b/ProgrammingAssignment_1/model.ipynb
@@ -122,11 +122,11 @@
     "    Returns:\n",
     "        dist: float\n",
     "    '''\n",
-    "if metric == 'Euclidean':\n",
+    "   if metric == 'Euclidean':\n",
     "       raise NotImplementedError",
-    "elif metric == 'Manhattan':\n",
+    "   elif metric == 'Manhattan':\n",
     "       raise NotImplementedError\n",
-    "else:\n",
+    "   else:\n",
     "       raise ValueError('{} is not a valid metric.'.format(metric))\n",
     "   return dist # scalar distance btw x and y"
    ]