diff --git a/pyproject.toml b/pyproject.toml
index 57907ce..88f8448 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,7 @@ dev = [
     "setuptools",
     "wheel",
     "Sphinx>=4.3.0,<8.3.0",
-    "furo==2025.9.25",
+    "furo==2025.12.19",
 
     "myst-parser>=1.0,<4.1",
     "sphinx-copybutton==0.5.2",