diff --git a/smithy-docgen-core/src/main/resources/software/amazon/smithy/docgen/core/integrations/sphinx/requirements-furo.txt b/smithy-docgen-core/src/main/resources/software/amazon/smithy/docgen/core/integrations/sphinx/requirements-furo.txt
index edecf0c..651ef8d 100644
--- a/smithy-docgen-core/src/main/resources/software/amazon/smithy/docgen/core/integrations/sphinx/requirements-furo.txt
+++ b/smithy-docgen-core/src/main/resources/software/amazon/smithy/docgen/core/integrations/sphinx/requirements-furo.txt
@@ -1,2 +1,2 @@
 # These are requirements only needed for the base furo theme
-furo==2025.9.25
+furo==2025.12.19