diff --git a/pyproject.toml b/pyproject.toml
index 1c0df3b..6c9a14c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ dev = [
 docs = [
     "furo==2025.12.19",
     "jupyter~=1.1",
-    "myst-nb~=1.2.0",
+    "myst-nb>=1.2,<1.4",
     "sphinx~=7.4",
     "sphinx-argparse==0.4.0",
     "sphinx-autobuild==2024.10.3",