diff --git a/src/documentation/content/xdocs/components/resolver/resolver-article.xml b/src/documentation/content/xdocs/components/resolver/resolver-article.xml
index 01afa74..cffad75 100644
--- a/src/documentation/content/xdocs/components/resolver/resolver-article.xml
+++ b/src/documentation/content/xdocs/components/resolver/resolver-article.xml
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE article
   PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
diff --git a/src/documentation/content/xdocs/components/resolver/resolver-release-notes.xml b/src/documentation/content/xdocs/components/resolver/resolver-release-notes.xml
index a4bda80..2597def 100644
--- a/src/documentation/content/xdocs/components/resolver/resolver-release-notes.xml
+++ b/src/documentation/content/xdocs/components/resolver/resolver-release-notes.xml
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE article
   PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">