diff --git a/dmnverifierfrontend/src/main/java/de/unikoblenz/fgbks/dmn/frontend/HttpFilter.java b/dmnverifierfrontend/src/main/java/de/unikoblenz/fgbks/dmn/frontend/HttpFilter.java
index 73ae93d3c2151229118fbd8641ef27cff359ddf7..d464bc39729e43fa191433d9c446ee2f945c7899 100644
--- a/dmnverifierfrontend/src/main/java/de/unikoblenz/fgbks/dmn/frontend/HttpFilter.java
+++ b/dmnverifierfrontend/src/main/java/de/unikoblenz/fgbks/dmn/frontend/HttpFilter.java
@@ -22,8 +22,10 @@ public class HttpFilter implements ContainerRequestFilter {
     System.out.println(reqContext.getMethod());
     log(uriInfo, reqContext.getHeaders());
 
-    reqContext.abortWith(Response.noContent().build());
-    reqContext.setRequestUri(URI.create("/index.html"));
+    if (reqContext.getHeaders().getFirst("Accept").contains("text/html")) {
+      reqContext.abortWith(Response.noContent().build());
+      reqContext.setRequestUri(URI.create("/index.html"));
+    }
 
     System.out.println("-- request info --");
     uriInfo = reqContext.getUriInfo();