diff --git a/src/main/java/de/landsh/opendata/catalogproxy/FilterController.java b/src/main/java/de/landsh/opendata/catalogproxy/FilterController.java
index 1d42aed27701aa495ef830440f093dd610f790fe..ecefbf5d4d9a988acf35c0458d77cf7bc40289dc 100644
--- a/src/main/java/de/landsh/opendata/catalogproxy/FilterController.java
+++ b/src/main/java/de/landsh/opendata/catalogproxy/FilterController.java
@@ -37,7 +37,7 @@ public class FilterController {
         is.close();
 
         response.setCharacterEncoding("utf-8");
-        response.setContentType("application/xml");
+        response.setContentType("application/rdf+xml");
 
         Writer writer = response.getWriter();
         model.write(writer);