diff --git a/pyproject.toml b/pyproject.toml
index 637486b2..a8afeaab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -82,7 +82,7 @@ rtd = [
     "plotly",
     "sphinx-book-theme>=0.3",
     "sphinx-copybutton",
-    "sphinx-design~=0.4.0",
+    "sphinx-design>=0.4,<0.7",
     "sphinxcontrib-bibtex",
     "sympy",
 ]