diff --git a/requirements-docs.txt b/requirements-docs.txt
index cf74980..49aa4a5 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -24,7 +24,7 @@ pandas>=2.0.0
 mistune>=3.0.0
 docutils!=0.21
 jsonpath>=0.82,<0.83
-python-frontmatter>=1.0.0
+python-frontmatter>=1.3.0
 pydantic>=2.3.0
 
 # Production WSGI server. Floor is the CVE fix line; CI asserts this version