diff --git a/requirements/docs.txt b/requirements/docs.txt
index 84c91c874..e4a67b958 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -5,7 +5,7 @@ sphinx-autodoc-typehints>=1.12.0, <2.6.0
 sphinx-rtd-theme>=1.0.0, <3.1.0
 sphinxcontrib-apidoc>=0.3.0, <0.6.0
 sphinxcontrib-bibtex>=2.1.0, <3.0.0
-myst-parser>=1.0, <3.0
+myst-parser>=1.0, <4.0
 nbsphinx>=0.8.5, <0.10.0
 sphinx_design==0.6.1  # Pinning for now as sphinx_design is v.new and still in flux.
 ipykernel>=5.1.0, <7.0.0 # required for executing notebooks via nbsphinx