diff --git a/CMakeExternals/HDF5.cmake b/CMakeExternals/HDF5.cmake
index 173d839d0c..1c94385671 100644
--- a/CMakeExternals/HDF5.cmake
+++ b/CMakeExternals/HDF5.cmake
@@ -1,58 +1,58 @@
 #-----------------------------------------------------------------------------
 # HDF5
 #-----------------------------------------------------------------------------
 
 if(MITK_USE_HDF5)
 
   # Sanity checks
   if(DEFINED HDF5_DIR AND NOT EXISTS ${HDF5_DIR})
     message(FATAL_ERROR "HDF5_DIR variable is defined but corresponds to non-existing directory")
   endif()
 
   set(proj HDF5)
   set(proj_DEPENDENCIES )
   set(HDF5_DEPENDS ${proj})
 
   if(NOT DEFINED HDF5_DIR)
 
     set(additional_args )
     if(CTEST_USE_LAUNCHERS)
       list(APPEND additional_args
         "-DCMAKE_PROJECT_${proj}_INCLUDE:FILEPATH=${CMAKE_ROOT}/Modules/CTestUseLaunchers.cmake"
       )
     endif()
 
     # We might build static libs with  -DBUILD_SHARED_LIBS=0 but this conflicts with
     # the in ITK integrated version! So we need to go the way with dynamic libs. Too
     # bad :( This would be fixed by using an external HDF-Installation with ITK/VTK
 
     ExternalProject_Add(${proj}
-       URL ${MITK_THIRDPARTY_DOWNLOAD_PREFIX_URL}/hdf5-1.8.12.tar.gz
-       URL_MD5 d804802feb99b87fc668a90e6fa34411
+       URL ${MITK_THIRDPARTY_DOWNLOAD_PREFIX_URL}/hdf5-1.8.17.tar.gz
+       URL_MD5 7d572f8f3b798a628b8245af0391a0ca
        CMAKE_GENERATOR ${gen}
        CMAKE_ARGS
          ${ep_common_args}
          ${additional_args}
          -DHDF5_BUILD_HL_LIB:BOOL=ON
          -DHDF5_BUILD_CPP_LIB:BOOL=ON
          -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
        CMAKE_CACHE_ARGS
          ${ep_common_cache_args}
        CMAKE_CACHE_DEFAULT_ARGS
          ${ep_common_cache_default_args}
        DEPENDS ${proj_DEPENDENCIES}
       )
 
     ExternalProject_Get_Property(${proj} install_dir)
     if(WIN32)
       set(HDF5_DIR ${install_dir}/cmake/)
     else()
       set(HDF5_DIR ${install_dir}/share/cmake)
     endif()
 
   else()
 
     mitkMacroEmptyExternalProject(${proj} "${proj_DEPENDENCIES}")
 
   endif()
 endif(MITK_USE_HDF5)
diff --git a/CMakeExternals/MITKData.cmake b/CMakeExternals/MITKData.cmake
index 61bfc00207..24e5461c37 100644
--- a/CMakeExternals/MITKData.cmake
+++ b/CMakeExternals/MITKData.cmake
@@ -1,39 +1,39 @@
 #-----------------------------------------------------------------------------
 # MITK Data
 #-----------------------------------------------------------------------------
 
 # Sanity checks
 if(DEFINED MITK_DATA_DIR AND NOT EXISTS ${MITK_DATA_DIR})
   message(FATAL_ERROR "MITK_DATA_DIR variable is defined but corresponds to non-existing directory")
 endif()
 
 set(proj MITK-Data)
 set(proj_DEPENDENCIES)
 set(MITK-Data_DEPENDS ${proj})
 
 if(BUILD_TESTING)
 
-  set(revision_tag 826b368f) # first 8 characters of hash-tag
+  set(revision_tag f81328b8) # first 8 characters of hash-tag
 #                  ^^^^^^^^  these are just to check correct length of hash part
 
   ExternalProject_Add(${proj}
     SOURCE_DIR ${proj}
 #    GIT_REPOSITORY https://phabricator.mitk.org/diffusion/MD/mitk-data.git
 #    GIT_TAG ${revision_tag}
     URL ${MITK_THIRDPARTY_DOWNLOAD_PREFIX_URL}/mitk-data_${revision_tag}.tar.gz
     UPDATE_COMMAND ""
     CONFIGURE_COMMAND ""
     BUILD_COMMAND ""
     INSTALL_COMMAND ""
     DEPENDS ${proj_DEPENDENCIES}
   )
 
   set(MITK_DATA_DIR ${CMAKE_CURRENT_BINARY_DIR}/${proj})
 
 else()
 
   mitkMacroEmptyExternalProject(${proj} "${proj_DEPENDENCIES}")
 
 endif(BUILD_TESTING)