diff --git a/pyproject.toml b/pyproject.toml
index ec4140836e47fe5290a7389a49044cb57ca60baf..8aa2d05f11de2f296aa379449abf8986660d865f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ requests = "^2"
 [tool.poetry.dev-dependencies]
 Sphinx = "^4.5.0"
 coverage = "^6.3.2 || ^7.0.0"
-myst-parser = "^0.17.0 || ^0.19.0 || ^1.0.0"
+myst-parser = "^0.17.0 || ^0.19.0 || ^1.0.0 || ^4.0.0"
 sphinx-rtd-theme = "^1.0.0"
 
 [build-system]