diff --git a/pyproject.toml b/pyproject.toml
index 09d4f156..b2034406 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ scipy=">1.4"
 [tool.poetry.dev-dependencies]
 jupyter="1.0.0"
 xgboost="0.90"
-matplotlib="3.1.1"
+matplotlib="3.8.2"
 wget="3.2"
 pandas="0.25.3"
 flake8="3.7.9"