diff --git a/pyproject.toml b/pyproject.toml
index 1990b1ca..ee0cd671 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,7 @@ docs = [
     # sphinx-design 0.5.0 is the first to allow Sphinx 7.
     "sphinx-design >= 0.5",
     "sphinx-issues ~= 4.1.0",
-    "sphinxcontrib-mermaid ~= 0.9.2",
+    "sphinxcontrib-mermaid ~= 1.0.0",
     "sphinxext-opengraph ~= 0.9.0",
     "tomli ~= 2.0.1 ; python_version < '3.11'",
 ]