diff --git a/doc/config.yaml b/doc/config.yaml
index 7386f632..02b4a141 100644
--- a/doc/config.yaml
+++ b/doc/config.yaml
@@ -1,5 +1,5 @@
 baseURL: "https://theme.scientific-python.org/"
-languageCode: "en-us"
+locale: "en-us"
 title: "Scientific Python Hugo Theme documentation"
 theme: scientific-python-hugo-theme
 relativeURLs: true
diff --git a/doc/netlify.toml b/doc/netlify.toml
index 955f670e..b893792d 100644
--- a/doc/netlify.toml
+++ b/doc/netlify.toml
@@ -1,6 +1,6 @@
 [build.environment]
   PYTHON_VERSION = "3.13"
-  HUGO_VERSION = "0.158.0"
+  HUGO_VERSION = "0.166.0"
   DART_SASS_VERSION = "1.93.2"
   DART_SASS_URL = "https://github.com/sass/dart-sass/releases/download/"