diff --git a/docs/requirements.txt b/docs/requirements.txt
index 0f98095a..20bf937d 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,7 +2,7 @@ jinja2==3.1.2 # https://github.com/readthedocs/readthedocs.org/issues/9037#issue
 Sphinx==5.3.0 #override sphinx pinning done by RTD: https://docs.readthedocs.io/en/stable/build-default-versions.html#external-dependencies
 sphinx-argparse
 sphinx-rtd-theme==1.1.1
-matplotlib==2.2.4
+matplotlib>=2.2.4
 PyYAML==6.0
 mock==5.0.1
 recommonmark