diff --git a/requirements.txt b/requirements.txt
index 04663d0..b31fb4c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,3 +10,4 @@ mapclassify==2.6.1
 pdbio==0.4.2
 altair==4.2.2
 pandas==2.2.2
+matplotlib==3.8.2