diff --git a/docs.it4i/css/extra.css b/docs.it4i/css/extra.css
new file mode 100644
index 0000000000000000000000000000000000000000..e7c2377a013043583b70293d4abbd6ad2a32f474
--- /dev/null
+++ b/docs.it4i/css/extra.css
@@ -0,0 +1 @@
+img[alt=external] { width: 12px; height: 12px;}
diff --git a/mkdocs.yml b/mkdocs.yml
index e46261d09f3b498fedac27bf3ab628c1abd36084..13210451ea33ce8a557aa4ac41060df44d096cd9 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -1,5 +1,6 @@
 site_name: Documentation
 theme_dir: 'it4i_theme'
+extra_css: [css/extra.css]
 docs_dir: docs.it4i
 site_favicon: img/favicon.ico
 copyright: "Build at "