diff --git a/pyproject.toml b/pyproject.toml
index 52edabb..8f1ce02 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ dependencies = [
     "imutils>=0.5.4",
     "ipympl>=0.9.1",
     "ipywidgets>=7.7.1",
-    "matplotlib>=3.5.1",
+    "matplotlib>=3.5.1,<3.10.0",
     "numpy>=1.21.6",
     "opencv-python>=4.8.1.78",
     "pynxtools-mpes>=0.2.1",