diff --git a/pyproject.toml b/pyproject.toml
index 32e1744..4e1e218 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -122,7 +122,7 @@ optional-dependencies.develop = [
 ]
 optional-dependencies.doc = [
   "furo==2024.1.29",               # Check visited link style on newer versions!
-  "myst-parser[linkify]>=0.18,<4",
+  "myst-parser[linkify]>=0.18,<5",
   "sphinx-autobuild==2021.3.14",   # Newer versions stopped "watching" appropriately?
   "sphinx-copybutton",
   "sphinx-design-elements<1",