diff --git a/requirements.txt b/requirements.txt
index 1f448d0..4611639 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ datamodel-code-generator>=0.12.0
 # maths
 fraction>=2.2.0
 numpy>=1.22.4
-matplotlib>=3.5.1
+matplotlib>=3.6.1
 
 # tables, data frames
 pandas>=1.4.2