diff --git a/publichealth/settings/base.py b/publichealth/settings/base.py
index 371adad..f9d716a 100644
--- a/publichealth/settings/base.py
+++ b/publichealth/settings/base.py
@@ -43,6 +43,7 @@ INSTALLED_APPS = [
     'wagtail.contrib.forms',
     'wagtail.contrib.redirects',
     'wagtail.contrib.search_promotions',
+    "wagtail.contrib.legacy.richtext",
 
     'wagtail.embeds',
     'wagtail.sites',