diff --git a/pyproject.toml b/pyproject.toml
index eebc770..58711d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -62,7 +62,7 @@ pre-commit = [
 docs = [
     "sphinx>=7,<8",
     "nbsphinx>=0.9,<1.0",
-    "sphinx_rtd_theme>=3,<3.1",
+    "sphinx_rtd_theme>=3,<3.2",
     "sphinx_copybutton>=0.5,<1.0",
     "sphinxcontrib-contentui>=0.2,<1.0",
     "sphinxcontrib-details-directive>=0.1,<1.0",