diff --git a/2023_PyData_Berlin/requirements.txt b/2023_PyData_Berlin/requirements.txt
index 22a18b6..4ab2c02 100644
--- a/2023_PyData_Berlin/requirements.txt
+++ b/2023_PyData_Berlin/requirements.txt
@@ -1,6 +1,6 @@
 numpy==2.1.1
 pandas==2.2.3
-matplotlib==3.9.2
+matplotlib==3.9.4
 pytest==8.3.3
 flake8==7.1.1
 black==24.8.0