diff --git a/pyproject.toml b/pyproject.toml
index dc36a740..6a1dcebc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ dependencies = [
     "cwltool",
     "cwlref-runner",
     "cwl-utils==0.*",
-    "myst-parser==3.*",
+    "myst-parser==4.*",
     "pydata-sphinx-theme==0.*",
     "sphinx==7.*",
     "sphinx-reredirects==0.1.*",