diff --git a/Chapter 04/Network Science Book, Chapter 4.ipynb b/Chapter 04/Network Science Book, Chapter 4.ipynb
index f8a770f..5f67f98 100644
--- a/Chapter 04/Network Science Book, Chapter 4.ipynb	
+++ b/Chapter 04/Network Science Book, Chapter 4.ipynb	
@@ -299,7 +299,7 @@
     "G1.add_edge(\"a\", \"b\", capacity=2.0)\n",
     "G1.add_edge(\"a\", \"d\", capacity=0.5)\n",
     "G1.add_edge(\"b\", \"d\", capacity=3.0)\n",
-    "G1.add_edge(\"c\", \"d\", capacity=2.5)\n",
+    "G1.add_edge(\"d\", \"c\", capacity=2.5)\n",
     "G1.add_edge(\"c\", \"e\", capacity=1.0)\n",
     "G1.add_edge(\"e\", \"f\", capacity=4.0)\n",
     "G1.add_edge(\"f\", \"g\", capacity=1.0)"
@@ -317,7 +317,7 @@
        "{('a', 'b'): Text(-0.567604752240033, 0.18135830275799097, '2.0'),\n",
        " ('a', 'd'): Text(-0.726853900310592, 0.1807546992189645, '0.5'),\n",
        " ('b', 'd'): Text(-0.7048010782322602, 0.24045572112290678, '3.0'),\n",
-       " ('c', 'd'): Text(-0.522076158683626, 0.1386608682331067, '2.5'),\n",
+       " ('d', 'c'): Text(-0.522076158683626, 0.1386608682331067, '2.5'),\n",
        " ('c', 'e'): Text(0.15981867009122883, -0.06250208712467721, '1.0'),\n",
        " ('e', 'f'): Text(0.5896809109236588, -0.19489131278049315, '4.0'),\n",
        " ('f', 'g'): Text(0.8398111953002138, -0.23878227442525388, '1.0')}"
@@ -356,7 +356,7 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "(0, ({'a', 'd', 'b'}, {'f', 'e', 'g', 'c'}))\n"
+      "(1.0, ({'a', 'e', 'f', 'b', 'd', 'c'}, {'g'}))\n"
      ]
     }
    ],