diff --git a/.github/workflows/build_docker_images_for_ci.yml b/.github/workflows/build_docker_images_for_ci.yml
index 4d1b04fd..aaf8fbf6 100644
--- a/.github/workflows/build_docker_images_for_ci.yml
+++ b/.github/workflows/build_docker_images_for_ci.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Build the Docker image
       run: docker build . --file .github/docker_files/docker_file_ci_ubuntu_20_04/DockerFile --tag kratosmultiphysics/co-sim-io-image-ci-ubuntu-20-04
     - name: Docker Login
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 38b4b91c..0231e242 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
     timeout-minutes: 30
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Install dependencies
       run: |
@@ -132,7 +132,7 @@ jobs:
     timeout-minutes: 15
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Install Intel compiler
       if: ${{ matrix.compiler == 'ICC' }}
@@ -153,7 +153,7 @@ jobs:
         sudo apt-get install libopenmpi-dev openmpi-bin
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -198,7 +198,7 @@ jobs:
     timeout-minutes: 15
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Build CoSimIO
       run: |
@@ -225,10 +225,10 @@ jobs:
     timeout-minutes: 15
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -257,7 +257,7 @@ jobs:
     timeout-minutes: 15
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Build CoSimIO
       shell: cmd
@@ -301,10 +301,10 @@ jobs:
     timeout-minutes: 15
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -355,7 +355,7 @@ jobs:
       image: kratosmultiphysics/kratos-image-ci-centos7:latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Build CoSimIO
       run: |
@@ -398,7 +398,7 @@ jobs:
         sudo apt-get update
         sudo apt-get install libopenmpi-dev openmpi-bin
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Build CoSimIO
       run: |
diff --git a/co_sim_io/c/co_sim_io_c.h b/co_sim_io/c/co_sim_io_c.h
index 221baea9..1a9444b8 100644
--- a/co_sim_io/c/co_sim_io_c.h
+++ b/co_sim_io/c/co_sim_io_c.h
@@ -35,7 +35,7 @@ enum CoSimIO_ConnectionStatus
     CoSimIO_DisconnectionError
 };
 
-CO_SIM_IO_NODISCARD CoSimIO_Info CoSimIO_Hello();
+CO_SIM_IO_NODISCARD CoSimIO_Info CoSimIO_Hello(void);
 
 CO_SIM_IO_NODISCARD CoSimIO_Info CoSimIO_Connect(
     const CoSimIO_Info I_Settings);
diff --git a/co_sim_io/c/co_sim_io_c_info.h b/co_sim_io/c/co_sim_io_c_info.h
index d9cfd770..98998bd2 100644
--- a/co_sim_io/c/co_sim_io_c_info.h
+++ b/co_sim_io/c/co_sim_io_c_info.h
@@ -22,7 +22,7 @@ typedef struct CoSimIO_Info
 } CoSimIO_Info;
 
 
-CO_SIM_IO_NODISCARD CoSimIO_Info CoSimIO_CreateInfo();
+CO_SIM_IO_NODISCARD CoSimIO_Info CoSimIO_CreateInfo(void);
 
 CO_SIM_IO_NODISCARD CoSimIO_Info CoSimIO_CopyInfo(const CoSimIO_Info I_Info);
 
diff --git a/co_sim_io/includes/vtk_utilities.hpp b/co_sim_io/includes/vtk_utilities.hpp
index 0f7d2d72..38e6600e 100644
--- a/co_sim_io/includes/vtk_utilities.hpp
+++ b/co_sim_io/includes/vtk_utilities.hpp
@@ -43,7 +43,13 @@ enum class VtkCellType {
 
 VtkCellType CO_SIM_IO_API GetVtkCellTypeForElementType(ElementType I_ElementType);
 
-void CO_SIM_IO_API WriteVtk(const Info& I_Settings, const ModelPart& I_ModelPart);
+void CO_SIM_IO_API WriteVtk(
+    const Info& I_Settings,
+    const ModelPart& I_ModelPart,
+    const std::unordered_map<std::string, std::vector<double>>& I_NodalScalarData={},
+    const std::unordered_map<std::string, std::vector<std::array<double,3>>>& I_NodalVectorData={},
+    const std::unordered_map<std::string, std::vector<double>>& I_ElementalScalarData={},
+    const std::unordered_map<std::string, std::vector<std::array<double,3>>>& I_ElementalVectorData={});
 
 void CO_SIM_IO_API ReadVtk(const Info& I_Settings, ModelPart& O_ModelPart);
 
diff --git a/co_sim_io/sources/vtk_utilities.cpp b/co_sim_io/sources/vtk_utilities.cpp
index 22fe097e..410dc7b7 100644
--- a/co_sim_io/sources/vtk_utilities.cpp
+++ b/co_sim_io/sources/vtk_utilities.cpp
@@ -53,12 +53,39 @@ VtkCellType GetVtkCellTypeForElementType(ElementType I_ElementType)
     return type_iter->second;
 }
 
-void WriteVtk(const Info& I_Settings, const ModelPart& I_ModelPart)
+void WriteVtk(
+    const Info& I_Settings,
+    const ModelPart& I_ModelPart,
+    const std::unordered_map<std::string, std::vector<double>>& I_NodalScalarData,
+    const std::unordered_map<std::string, std::vector<std::array<double,3>>>& I_NodalVectorData,
+    const std::unordered_map<std::string, std::vector<double>>& I_ElementalScalarData,
+    const std::unordered_map<std::string, std::vector<std::array<double,3>>>& I_ElementalVectorData)
 {
     const std::string file_name = I_Settings.Get<std::string>("file_name");
 
     const int precision = I_Settings.Get<int>("precision", 12);
 
+    // check sizes of data
+    for (const auto& r_data : I_NodalScalarData) {
+        CO_SIM_IO_ERROR_IF(r_data.first == "") << "No data name defined for nodal scalar data!" << std::endl;
+        CO_SIM_IO_ERROR_IF(r_data.second.size() != I_ModelPart.NumberOfNodes()) << "Size of scalar nodal data \"" << r_data.first << "\"(" << r_data.second.size() << ") does not match number of nodes (" << I_ModelPart.NumberOfNodes() << ")!" << std::endl;
+    }
+
+    for (const auto& r_data : I_NodalVectorData) {
+        CO_SIM_IO_ERROR_IF(r_data.first == "") << "No data name defined for nodal vector data!" << std::endl;
+        CO_SIM_IO_ERROR_IF(r_data.second.size() != I_ModelPart.NumberOfNodes()) << "Size of vector nodal data \"" << r_data.first << "\"(" << r_data.second.size() << ") does not match number of nodes (" << I_ModelPart.NumberOfNodes() << ")!" << std::endl;
+    }
+
+    for (const auto& r_data : I_ElementalScalarData) {
+        CO_SIM_IO_ERROR_IF(r_data.first == "") << "No data name defined for elemental scalar data!" << std::endl;
+        CO_SIM_IO_ERROR_IF(r_data.second.size() != I_ModelPart.NumberOfNodes()) << "Size of scalar elemental data \"" << r_data.first << "\"(" << r_data.second.size() << ") does not match number of elements (" << I_ModelPart.NumberOfElements() << ")!" << std::endl;
+    }
+
+    for (const auto& r_data : I_ElementalVectorData) {
+        CO_SIM_IO_ERROR_IF(r_data.first == "") << "No data name defined for elemental vector data!" << std::endl;
+        CO_SIM_IO_ERROR_IF(r_data.second.size() != I_ModelPart.NumberOfNodes()) << "Size of vector elemental data \"" << r_data.first << "\"(" << r_data.second.size() << ") does not match number of elements (" << I_ModelPart.NumberOfElements() << ")!" << std::endl;
+    }
+
     std::ofstream output_file;
     output_file.open(file_name);
     Utilities::CheckStream(output_file, file_name);
@@ -112,18 +139,39 @@ void WriteVtk(const Info& I_Settings, const ModelPart& I_ModelPart)
     }
     output_file << "\n";
 
+    const std::size_t num_point_data = 1 + I_NodalScalarData.size() + I_NodalVectorData.size();
+    const std::size_t num_cell_data = 2 + I_ElementalScalarData.size() + I_ElementalVectorData.size();
+
     // writing node Ids
     output_file << "POINT_DATA " << I_ModelPart.NumberOfNodes() << "\n";
-    output_file << "FIELD FieldData 1" << "\n";
+    output_file << "FIELD FieldData " << num_point_data << "\n";
     output_file << "NODE_ID 1 " << I_ModelPart.NumberOfNodes() << " int\n";
     for (const auto& r_node : I_ModelPart.Nodes()) {
         output_file << r_node.Id() << "\n";
     }
     output_file << "\n";
 
+    // writing nodal scalar data
+    for (const auto& r_data : I_NodalScalarData) {
+        output_file << r_data.first << " 1 " << I_ModelPart.NumberOfNodes() << " float\n";
+        for (const auto& v : r_data.second) {
+            output_file << v << "\n";
+        }
+        output_file << "\n";
+    }
+
+    // writing nodal vector data
+    for (const auto& r_data : I_NodalVectorData) {
+        output_file << r_data.first << " 3 " << I_ModelPart.NumberOfNodes() << " float\n";
+        for (const auto& v : r_data.second) {
+            output_file << v[0] << " " << v[1] << " " << v[2] << "\n";
+        }
+        output_file << "\n";
+    }
+
     // writing element Ids
     output_file << "CELL_DATA " << I_ModelPart.NumberOfElements() << "\n";
-    output_file << "FIELD FieldData 1" << "\n";
+    output_file << "FIELD FieldData " << num_cell_data << "\n";
     output_file << "ELEMENT_ID 1 " << I_ModelPart.NumberOfElements() << " int\n";
     for (const auto& r_elem : I_ModelPart.Elements()) {
         output_file << r_elem.Id() << "\n";
@@ -131,13 +179,29 @@ void WriteVtk(const Info& I_Settings, const ModelPart& I_ModelPart)
     output_file << "\n";
 
     // writing element types
-    output_file << "CELL_DATA " << I_ModelPart.NumberOfElements() << "\n";
-    output_file << "FIELD FieldData 1" << "\n";
     output_file << "ELEMENT_TYPE 1 " << I_ModelPart.NumberOfElements() << " int\n";
     for (const auto& r_elem : I_ModelPart.Elements()) {
         output_file << static_cast<int>(r_elem.Type()) << "\n";
     }
 
+    // writing elemental scalar data
+    for (const auto& r_data : I_ElementalScalarData) {
+        output_file << r_data.first << " 1 " << I_ModelPart.NumberOfElements() << " float\n";
+        for (const auto& v : r_data.second) {
+            output_file << v << "\n";
+        }
+        output_file << "\n";
+    }
+
+    // writing elemental vector data
+    for (const auto& r_data : I_ElementalVectorData) {
+        output_file << r_data.first << " 3 " << I_ModelPart.NumberOfElements() << " float\n";
+        for (const auto& v : r_data.second) {
+            output_file << v[0] << " " << v[1] << " " << v[2] << "\n";
+        }
+        output_file << "\n";
+    }
+
     output_file.close();
 }
 
diff --git a/tests/co_sim_io/cpp/test_vtk_utilities.cpp b/tests/co_sim_io/cpp/test_vtk_utilities.cpp
index 10d86090..20ade4c1 100644
--- a/tests/co_sim_io/cpp/test_vtk_utilities.cpp
+++ b/tests/co_sim_io/cpp/test_vtk_utilities.cpp
@@ -43,10 +43,17 @@ TEST_CASE("write_read_vtk")
     Info info_vtk;
     info_vtk.Set<std::string>("file_name", file_name);
 
-    CoSimIO::VtkUtilities::WriteVtk(info_vtk, model_part_write);
+    CoSimIO::VtkUtilities::WriteVtk(
+        info_vtk,
+        model_part_write,
+        {{std::string("pressure"),{1,2.5,3}}}, // nodal scalar data
+        {{std::string("Disp"),{{1,2.5,3}, {0,0,2}, {-215, 456, 98}}}}, // nodal vector data
+        {{std::string("AREA"),{1.02,25.5,-3}}}, // elemental scalar data
+        {{std::string("gradient"),{{1,2.5,3},{1,3,974},{0,0,0}}}} // elemental vector data
+        );
     CoSimIO::VtkUtilities::ReadVtk(info_vtk, model_part_read);
 
-    fs::remove(file_name);
+    // fs::remove(file_name);
 
     CheckModelPartsAreEqual(model_part_write, model_part_read);
 }