diff --git a/pyproject.toml b/pyproject.toml
index ca1c25b..e9e8209 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -126,7 +126,7 @@ optional-dependencies.develop = [
   "validate-pyproject<1",
 ]
 optional-dependencies.doc = [
-  "furo==2025.9.25",               # Check visited link style on newer versions!
+  "furo==2025.12.19",               # Check visited link style on newer versions!
   "myst-parser[linkify]>=0.18,<5",
   "sphinx<8",
   "sphinx-autobuild==2021.3.14",   # Newer versions stopped "watching" appropriately?