diff --git a/layouts/_default/baseof.html b/layouts/_default/baseof.html
index a0ea0d9..12cd30c 100644
--- a/layouts/_default/baseof.html
+++ b/layouts/_default/baseof.html
@@ -8,7 +8,7 @@
 {{- partial "site-meta.html" . -}}
 {{ $author := (.Params.author | default .Site.Params.author.name) -}}<meta name="author" content="{{ $author }}">
 {{- with .Page.Params.description | default .Site.Params.description -}}<meta name="description" content="{{.}}">{{- end -}}
-{{- partial "structured-data.html" . -}}
+{{- partial "structure-extra.html" . -}}
 <title>{{.Title}}</title>
 {{ range .AlternativeOutputFormats -}}
 {{ printf `<link rel="%s" type="%s" href="%s" title="%s" />` .Rel .MediaType.Type .Permalink $.Title | safeHTML }}
diff --git a/layouts/partials/header.html b/layouts/partials/header.html
index 8562162..aa74570 100644
--- a/layouts/partials/header.html
+++ b/layouts/partials/header.html
@@ -16,7 +16,7 @@
 				{{- with .Site.Params.socialLinks -}}
 				<span class="hdr-social hide-in-mobile">{{- partialCached "social-icons.html" . -}}</span>
 				{{- end -}}
-				{{- if and (not (eq .Site.Params.shareSocial nil)) (.Site.Params.shareSocial) -}}{{- partial "social-share.html" . -}}{{- end -}}
+				{{- if and (not (eq .Site.Params.shareSocial nil)) (.Site.Params.shareSocial) (templates.Exists "partials/social-share.html") -}}{{- partial "social-share.html" . -}}{{- end -}}
 				<button id="menu-btn" class="hdr-btn" title="{{i18n "menu"}}">{{- partial "svg.html" (dict "context" . "name" "menuBtn") -}}</button>
 			</div>
 		</div>
diff --git a/layouts/partials/structure-extra.html b/layouts/partials/structure-extra.html
new file mode 100644
index 0000000..5693634
--- /dev/null
+++ b/layouts/partials/structure-extra.html
@@ -0,0 +1,6 @@
+{{/* We use some Hugo built-in templates, you can find their source here: */}}
+{{/* https://github.com/gohugoio/hugo/tree/master/tpl/tplimpl/embedded/templates */}}
+
+{{- template "_internal/schema.html" . -}}
+{{- template "_internal/opengraph.html" . -}}
+{{- template "_internal/twitter_cards.html" . -}}
\ No newline at end of file