diff --git a/xplainet/pyproject.toml b/xplainet/pyproject.toml
index a21dcd3..2fde33a 100755
--- a/xplainet/pyproject.toml
+++ b/xplainet/pyproject.toml
@@ -22,7 +22,7 @@ pytest = "6.1.2"
 notebook = "6.1.5"
 ipywidgets = "7.5.1"
 requests = "2.25.0"
-matplotlib = "3.3.3"
+matplotlib = "3.9.3"
 pandas = "1.1.4" 
 nb-black = "1.0.7"
 black = "20.8b1"