diff --git a/requirements.txt b/requirements.txt
index ef503e618..e4ced4a91 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ PyYAML==5.1.2
 fiona==1.8.6
 earthpy==0.7.4
 geopandas==0.5.1
-matplotlib==3.1.1
+matplotlib==3.9.1
 natsort==6.0.0
 numpy==1.17.2
 pandas==0.25.1