diff --git a/pyproject.toml b/pyproject.toml
index 64bb008..dbd512a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
 
 [project.optional-dependencies]
 test = [
-    "matplotlib==3.9.2",
+    "matplotlib==3.9.3",
     "pytest-cov==6.0.0",
     "pytest-mpl==0.17.0",
     "pytest==8.3.3",