diff --git a/_pkgdown.yml b/_pkgdown.yml
index 881c72f3..27a7fa1e 100644
--- a/_pkgdown.yml
+++ b/_pkgdown.yml
@@ -1,5 +1,6 @@
 url: epiforecasts.io/covidregionaldata/
 template:
+  bootstrap: 5
   params:
     bootswatch: lumen
     docsearch: