diff --git a/pyproject.toml b/pyproject.toml
index a530ad6..91c4a3d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -65,7 +65,7 @@ mkdocs-material = "^9.1.16"
 mkdocstrings = "^0.22.0"
 mkdocs-jupyter = "^0.24.1"
 mkdocs-macros-plugin = "^1.0.1"
-mkdocs-mermaid2-plugin = "^0.6.0"
+mkdocs-mermaid2-plugin = ">=0.6,<1.1"
 mkdocstrings-python = "^1.1.2"
 python-kacl = "^0.4.6"
 pymdown-extensions = "^10.0.1"