diff --git a/core/src/main/java/org/mapfish/print/map/style/SLDParserPlugin.java b/core/src/main/java/org/mapfish/print/map/style/SLDParserPlugin.java
index fc27e2a518..bab2d95eef 100644
--- a/core/src/main/java/org/mapfish/print/map/style/SLDParserPlugin.java
+++ b/core/src/main/java/org/mapfish/print/map/style/SLDParserPlugin.java
@@ -94,6 +94,7 @@ private Optional<Style> tryLoadSLD(
             // by setting a custom error handler.
             DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
             dbf.setNamespaceAware(true);
+            dbf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
             DocumentBuilder db = dbf.newDocumentBuilder();
             db.setErrorHandler(new ErrorHandler());
             db.parse(new ByteArrayInputStream(bytes));