diff --git a/requirements.txt b/requirements.txt
index 438c747..4d149bb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ tweepy==3.10.0
 japanize-matplotlib==1.1.3
 pandas==1.1.5
 plotly==4.4.1
-matplotlib==3.2.2
+matplotlib==3.5.2
 seaborn==0.11.1
 black==21.4b2
 isort==5.8.0