diff --git a/layouts/_default/baseof.html b/layouts/_default/baseof.html
index 86baac14..b9a6a22d 100644
--- a/layouts/_default/baseof.html
+++ b/layouts/_default/baseof.html
@@ -1,3 +1,4 @@
+{{- partial "partials/functions/warnings.html" .Site -}}
 <!DOCTYPE html>
 <html
   lang="{{ with .Site.Params.isoCode | default (.Site.LanguageCode | default "en") }}
diff --git a/layouts/partials/functions/warnings.html b/layouts/partials/functions/warnings.html
new file mode 100644
index 00000000..ecc6db9c
--- /dev/null
+++ b/layouts/partials/functions/warnings.html
@@ -0,0 +1,6 @@
+{{ if ne .Site.Params.showAppearanceSwitcher nil }}
+  {{ warnf "[CONGO] Theme parameter `showAppearanceSwitcher` has been renamed to `footer.showAppearanceSwitcher`. Please update your site configuration." }}
+{{ end }}
+{{ if ne .Site.Params.showScrollToTop nil }}
+  {{ warnf "[CONGO] Theme parameter `showScrollToTop` has been renamed to `footer.showScrollToTop`. Please update your site configuration." }}
+{{ end }}
