diff --git a/Document Similarities/Document_Similarities.ipynb b/Document Similarities/Document_Similarities.ipynb
index efdbfb9..2136e47 100644
--- a/Document Similarities/Document_Similarities.ipynb	
+++ b/Document Similarities/Document_Similarities.ipynb	
@@ -258,7 +258,8 @@
    ],
    "source": [
     "# Every vector is already normalised to have unit L2 norm\n",
-    "np.linalg.norm(tfidf_vectors[0],ord=2)"
+    "p = np.array(tfidf_vectors[0].todense()).reshape(64,)\n",
+    "p.dot(p)"
    ]
   },
   {