diff --git a/atcoder/requirements.txt b/atcoder/requirements.txt
index c319c94f..0ed36190 100644
--- a/atcoder/requirements.txt
+++ b/atcoder/requirements.txt
@@ -2,7 +2,7 @@ numpy == 1.22.0
 scipy == 1.4.1
 scikit-learn == 0.22.2.post1
 numba == 0.48.0
-networkx == 2.4
+networkx ==2.8.8
 #atcoderにはないがグラフの可視化用にjupyter,matplotlib,あとojを追加
 jupyter
 matplotlib