diff --git a/externals/vts-libs b/externals/vts-libs
index 4a45bd5..4f4bd72 160000
--- a/externals/vts-libs
+++ b/externals/vts-libs
@@ -1 +1 @@
-Subproject commit 4a45bd5ad240065a2c8ddaf052d4f9b2051216f4
+Subproject commit 4f4bd72d402bab5c009a2a998fdc2d5b0e2c8076
diff --git a/mapproxy/src/mapproxy/CMakeLists.txt b/mapproxy/src/mapproxy/CMakeLists.txt
index 1c901c9..b6b57dc 100644
--- a/mapproxy/src/mapproxy/CMakeLists.txt
+++ b/mapproxy/src/mapproxy/CMakeLists.txt
@@ -155,6 +155,10 @@ file_to_cpp(mapproxy_CESIUM_SOURCES
   cesium::cesium_js
   cesium/cesium.js)
 
+file_to_cpp(mapproxy_CESIUM_SOURCES
+  cesium::melowntech_png
+  cesium/melown-technologies-logo-transparent-28.png)
+
 add_executable(mapproxy
   ${mapproxy_SOURCES}
   ${mapproxy_BROWSER_SOURCES}
diff --git a/mapproxy/src/mapproxy/cesium.cpp b/mapproxy/src/mapproxy/cesium.cpp
index 58ad78f..d336eff 100644
--- a/mapproxy/src/mapproxy/cesium.cpp
+++ b/mapproxy/src/mapproxy/cesium.cpp
@@ -28,6 +28,7 @@
 
 #include "cesium/cesium.html.hpp"
 #include "cesium/cesium.js.hpp"
+#include "cesium/melown-technologies-logo-transparent-28.png.hpp"
 
 namespace cesium {
 
@@ -47,6 +48,13 @@ const vtslibs::storage::SupportFile::Files supportFiles =
             , cesium_js_attr_lastModified
             , "application/javascript; charset=utf-8"
         }
+    }, { "melowntech.png"
+      , {
+            melowntech_png
+            , sizeof(melowntech_png)
+            , melowntech_png_attr_lastModified
+            , "image/png"
+        }
     }
 };
 
diff --git a/mapproxy/src/mapproxy/cesium/cesium.js b/mapproxy/src/mapproxy/cesium/cesium.js
index 4089b09..ceb3263 100644
--- a/mapproxy/src/mapproxy/cesium/cesium.js
+++ b/mapproxy/src/mapproxy/cesium/cesium.js
@@ -33,9 +33,16 @@ function launchCesium(imageryProvider) {
         , scene3DOnly: true
         , navigationInstructionsInitiallyVisible: false
         , selectionIndicator: false
+        , requestRenderMode : true
         , imageryProvider: imageryProvider
         , terrainProvider: terrainProvider
     });
+
+    var melownCredit = new Cesium.Credit
+        ('<a href="https://www.melown.com/">'
+         + '<img src="melowntech.png" title="Melown Technologies SE" />'
+         + '</a>');
+    viewer.scene.frameState.creditDisplay.addDefaultCredit(melownCredit);
 }
 
 function resolveUrl(url, base) {
diff --git a/mapproxy/src/mapproxy/cesium/melown-technologies-logo-transparent-28.png b/mapproxy/src/mapproxy/cesium/melown-technologies-logo-transparent-28.png
new file mode 100644
index 0000000..a2edb79
Binary files /dev/null and b/mapproxy/src/mapproxy/cesium/melown-technologies-logo-transparent-28.png differ
diff --git a/mapproxy/src/mapproxy/generator/surface.cpp b/mapproxy/src/mapproxy/generator/surface.cpp
index 74d229a..46b97b5 100644
--- a/mapproxy/src/mapproxy/generator/surface.cpp
+++ b/mapproxy/src/mapproxy/generator/surface.cpp
@@ -29,6 +29,7 @@
 #include <boost/filesystem.hpp>
 #include <boost/format.hpp>
 #include <boost/utility/in_place_factory.hpp>
+#include <boost/lexical_cast.hpp>
 
 #include <opencv2/highgui/highgui.hpp>
 
@@ -39,6 +40,7 @@
 #include "imgproc/rastermask/cvmat.hpp"
 #include "imgproc/png.hpp"
 
+#include "vts-libs/registry/io.hpp"
 #include "vts-libs/storage/fstreams.hpp"
 #include "vts-libs/vts/io.hpp"
 #include "vts-libs/vts/nodeinfo.hpp"
@@ -641,6 +643,12 @@ void SurfaceBase::layerJson(Sink &sink, const SurfaceFileInfo &fi) const
         }
     }
 
+    if (!r.credits.empty()) {
+        layer.attribution
+            = boost::lexical_cast<std::string>
+            (utility::join(html(asInlineCredits(r)), "<br/>"));
+    }
+
     std::ostringstream os;
     save(layer, os);
     sink.content(os.str(), fi.sinkFileInfo());
diff --git a/mapproxy/src/mapproxy/support/tilejson.cpp b/mapproxy/src/mapproxy/support/tilejson.cpp
index 35b0e42..7bea187 100644
--- a/mapproxy/src/mapproxy/support/tilejson.cpp
+++ b/mapproxy/src/mapproxy/support/tilejson.cpp
@@ -102,6 +102,7 @@ void build(Json::Value &content, const LayerJson &layer)
     build(content["available"], layer.available);
     content["minzoom"] = layer.zoom.min;
     content["maxzoom"] = layer.zoom.max;
+    build(content, "attribution", layer.attribution);
 }
 
 } // namespace
diff --git a/mapproxy/src/mapproxy/support/tilejson.hpp b/mapproxy/src/mapproxy/support/tilejson.hpp
index 326310e..e922837 100644
--- a/mapproxy/src/mapproxy/support/tilejson.hpp
+++ b/mapproxy/src/mapproxy/support/tilejson.hpp
@@ -65,6 +65,7 @@ struct LayerJson {
     vts::LodRange zoom;
     Available available;
     std::vector<std::string> tiles;
+    OString attribution;
 
     LayerJson()
         : tilejson(2, 0, 0), version(1, 0, 0), scheme(Scheme::xyz)