diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a0693d564438ece97e0e9bebc7262bf189a337d4..ebd21c1a26e184136b41d35d1091ba519e885f62 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -15,7 +15,7 @@ To contribute use a merge request as follows:
 - Run the tests.
 - Write or adapt tests as needed.
 - Add or change the documentation as needed.
-- Push your branch to your fork on gitea, the remote `origin`.
+- Push your branch to your fork on gitlab, the remote `origin`.
 - From your fork open a merge request in the correct branch. Target the project's `develop` or `open_source` branch
 - …
 - If we requests further changes just push them to your branch. The MR will be updated automatically.
diff --git a/src/gpu/VirtualFluids_GPU/Output/FileWriter.cpp b/src/gpu/VirtualFluids_GPU/Output/FileWriter.cpp
index a554d63cccbb9a2622f0bbffa143c8a586b88f44..ba8bac5939460c35c76a1ecbb378d2d69423c014 100644
--- a/src/gpu/VirtualFluids_GPU/Output/FileWriter.cpp
+++ b/src/gpu/VirtualFluids_GPU/Output/FileWriter.cpp
@@ -92,18 +92,18 @@ void VIRTUALFLUIDS_GPU_EXPORT FileWriter::writeCollectionFile(std::shared_ptr<Pa
     file.open( filename + ".pvtu" );
 
     //////////////////////////////////////////////////////////////////////////
-    
-    file << "<VTKFile type=\"PUnstructuredGrid\" version=\"1.0\" byte_order=\"LittleEndian\" header_type=\"UInt64\">" << std::endl;
+    file << "<?xml version=\"1.0\"?>" << std::endl;
+    file << "<VTKFile type=\"PUnstructuredGrid\" version=\"0.1\" byte_order=\"LittleEndian\">" << std::endl;
     file << "  <PUnstructuredGrid GhostLevel=\"1\">" << std::endl;
 
     file << "    <PPointData>" << std::endl;
-    file << "       <DataArray type=\"Float32\" Name=\"press\" /> " << std::endl;
-    file << "       <DataArray type=\"Float32\" Name=\"rho\"   /> " << std::endl;
-    file << "       <DataArray type=\"Float32\" Name=\"vx1\"   /> " << std::endl;
-    file << "       <DataArray type=\"Float32\" Name=\"vx2\"   /> " << std::endl;
-    file << "       <DataArray type=\"Float32\" Name=\"vx3\"   /> " << std::endl;
-    file << "       <DataArray type=\"Float32\" Name=\"geo\"   /> " << std::endl;
-    if( para->getDiffOn() ) file << "       <DataArray type=\"Float32\" Name=\"conc\"  /> " << std::endl;
+    file << "       <PDataArray type=\"Float64\" Name=\"press\" /> " << std::endl;
+    file << "       <PDataArray type=\"Float64\" Name=\"rho\"   /> " << std::endl;
+    file << "       <PDataArray type=\"Float64\" Name=\"vx1\"   /> " << std::endl;
+    file << "       <PDataArray type=\"Float64\" Name=\"vx2\"   /> " << std::endl;
+    file << "       <PDataArray type=\"Float64\" Name=\"vx3\"   /> " << std::endl;
+    file << "       <PDataArray type=\"Float64\" Name=\"geo\"   /> " << std::endl;
+    if( para->getDiffOn() ) file << "       <PDataArray type=\"Float64\" Name=\"conc\"  /> " << std::endl;
     file << "    </PPointData>" << std::endl;
 
     file << "    <PPoints>" << std::endl;