diff --git a/pyproject.toml b/pyproject.toml
index 65061af6..68c8c658 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -67,7 +67,7 @@ optional-dependencies.docs = [
     "myst-parser>=4",
     "sphinx>=8",
     "sphinx-copybutton",
-    "sphinx-rtd-theme<4,>=3.0.0rc1",
+    "sphinx-rtd-theme>=3,<4",
     "sphinx-tabs",
     "sphinxcontrib-django",
 ]