diff --git a/ci/requirements.txt b/ci/requirements.txt
index 5b68239..3b62372 100644
--- a/ci/requirements.txt
+++ b/ci/requirements.txt
@@ -1,5 +1,5 @@
 #python>=3.8
-matplotlib==3.8.3
+matplotlib==3.8.4
 numpy==1.26.4
 pandas==2.2.2
 xlrd>=1.0.0
diff --git a/ci/requirements_dev.txt b/ci/requirements_dev.txt
index 8a6895f..bba9bdc 100644
--- a/ci/requirements_dev.txt
+++ b/ci/requirements_dev.txt
@@ -1,5 +1,5 @@
 #python>=3.8
-matplotlib==3.8.3
+matplotlib==3.8.4
 numpy==1.26.4
 pandas==2.2.2
 xlrd>=1.0.0