diff --git a/requirements.txt b/requirements.txt
index 3c864dffe6..aaaa6c3584 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ graphviz<0.21.0
 grpcio<1.69.0
 leabra-psyneulink<0.3.3
 llvmlite<0.44
-matplotlib<3.7.6
+matplotlib<3.9.4
 modeci_mdf<0.5, >=0.4.3; (platform_machine == 'AMD64' or platform_machine == 'x86_64' or platform_machine == 'arm64' or platform_machine == 'aarch64') and platform_python_implementation == 'CPython' and implementation_name == 'cpython'
 networkx<3.5
 numpy>=1.21.0, <1.26.5
diff --git a/tutorial_requirements.txt b/tutorial_requirements.txt
index 7f6ba148e1..151df81a1f 100644
--- a/tutorial_requirements.txt
+++ b/tutorial_requirements.txt
@@ -1,3 +1,3 @@
 graphviz<0.21.0
 jupyter<1.1.2
-matplotlib<3.7.6
+matplotlib<3.9.4