diff --git a/requirements-docs.txt b/requirements-docs.txt
index c27129f..8167845 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -1,4 +1,4 @@
 # Docs site (MkDocs Material). Build: python -m mkdocs build ; preview: mkdocs serve
 mkdocs-material==9.7.6
 mkdocs-same-dir==0.1.5
-matplotlib>=3.8   # scripts/coverage.py — regenerates docs/assets/coverage.png
+matplotlib>=3.11.1   # scripts/coverage.py — regenerates docs/assets/coverage.png