diff --git a/requirements-dev.txt b/requirements-dev.txt
index 109a2a9..63d9d0a 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -55,7 +55,7 @@ mypy==1.19.1
     # via pyUSPTO (pyproject.toml)
 mypy-extensions==1.1.0
     # via mypy
-myst-parser==4.0.1
+myst-parser==5.0.0
     # via pyUSPTO (pyproject.toml)
 packaging==26.0
     # via