diff --git a/_requirements/default.txt b/_requirements/default.txt
index 913834f..50bc5f1 100644
--- a/_requirements/default.txt
+++ b/_requirements/default.txt
@@ -1,5 +1,5 @@
 setuptools==67.8.0
-matplotlib>=3.0.0, <3.8.0
+matplotlib>=3.0.0, <3.9.0
 ipython[notebook]>=8.0.0, <8.15.0
 urllib3  # for ipython
 torch>=1.8.1, <2.1.0