diff --git a/constraints.txt b/constraints.txt
index 4f1f7ced2f..2af87d80d7 100644
--- a/constraints.txt
+++ b/constraints.txt
@@ -16,7 +16,7 @@ httpx==0.28.1
 idna==3.10
 iniconfig==2.1.0
 Jinja2==2.10.3
-markdown-it-py==3.0.0
+markdown-it-py==4.0.0
 MarkupSafe==2.0.1
 mdurl==0.1.2
 netifaces==0.11.0
diff --git a/pyproject.toml b/pyproject.toml
index a4f4c8a5c8..f1a6d37524 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ dependencies = [
     "babel==2.12.1",          # http://babel.pocoo.org/en/latest/changelog.html
     "pyxdg>=0.26,<0.29",      # https://freedesktop.org/wiki/Software/pyxdg/
     "Jinja2>=2.10,<2.11",     # http://jinja.pocoo.org/docs/latest/changelog/
-    "markdown-it-py==3.0.0",  # https://github.com/executablebooks/markdown-it-py/blob/master/CHANGELOG.md
+    "markdown-it-py==4.0.0",  # https://github.com/executablebooks/markdown-it-py/blob/master/CHANGELOG.md
     "setuptools>=80,<81",     # https://setuptools.pypa.io/en/latest/history.html
 
     # See https://github.com/pallets/markupsafe/issues/286 but breaking change in