diff --git a/ports/libxml2/CMakeLists.txt b/ports/libxml2/CMakeLists.txt
index 3d49985ee2..12142f4ff9 100644
--- a/ports/libxml2/CMakeLists.txt
+++ b/ports/libxml2/CMakeLists.txt
@@ -13,6 +13,7 @@ find_package(unofficial-iconv REQUIRED)
 file(GLOB SOURCES *.c)
 list(FILTER SOURCES EXCLUDE REGEX "/(run|test|trio)[^/]*$")
 list(FILTER SOURCES EXCLUDE REGEX "xml(lint|catalog).c$")
+list(FILTER SOURCES EXCLUDE REGEX "rngparser\.c$")
 
 # Generate xmlexports with fixed definition of LIBXML_STATIC
 file(READ include/libxml/xmlexports.h XMLEXPORTS_H)
@@ -23,7 +24,7 @@ else()
 endif()
 file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/xmlexports.h "${XMLEXPORTS_H}")
 
-if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
+if(CMAKE_SYSTEM_NAME STREQUAL "Windows" OR CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
     configure_file(include/win32config.h config.h COPYONLY)
 elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
     configure_file("${PORT_DIR}/config.osx.h" config.h COPYONLY)
@@ -33,21 +34,86 @@ else()
     message(FATAL_ERROR "No config.h checked in for the target platform. Please run ./configure for libxml2 and add the resulting config.h into this port.")
 endif()
 
+message(STATUS "Reading version info from configure.ac")
+
+file(STRINGS "configure.ac"
+    _libxml_version_defines REGEX "LIBXML_(MAJOR|MINOR|MICRO)_VERSION=([0-9]+)$")
+
+foreach(ver ${_libxml_version_defines})
+    if(ver MATCHES "LIBXML_(MAJOR|MINOR|MICRO)_VERSION=([0-9]+)$")
+        set(LIBXML_${CMAKE_MATCH_1}_VERSION "${CMAKE_MATCH_2}" CACHE INTERNAL "")
+    endif()
+endforeach()
+
+set(VERSION ${LIBXML_MAJOR_VERSION}.${LIBXML_MINOR_VERSION}.${LIBXML_MICRO_VERSION})
+math(EXPR LIBXML_VERSION_NUMBER
+    "${LIBXML_MAJOR_VERSION} * 10000 + ${LIBXML_MINOR_VERSION} * 100 + ${LIBXML_MICRO_VERSION}")
+
+message(STATUS "LIBXML_MAJOR_VERSION: ${LIBXML_MAJOR_VERSION}")
+message(STATUS "LIBXML_MINOR_VERSION: ${LIBXML_MINOR_VERSION}")
+message(STATUS "LIBXML_MICRO_VERSION: ${LIBXML_MICRO_VERSION}")
+message(STATUS "VERSION: ${VERSION}")
+message(STATUS "LIBXML_VERSION_NUMBER: ${LIBXML_VERSION_NUMBER}")
+
+set(WITH_TRIO 0)
+set(WITH_THREADS 1)
+set(WITH_THREAD_ALLOC 0)
+set(WITH_TREE 1)
+set(WITH_OUTPUT 1)
+set(WITH_PUSH 1)
+set(WITH_READER 1)
+set(WITH_PATTERN 1)
+set(WITH_WRITER 1)
+set(WITH_SAX1 1)
+set(WITH_FTP 1)
+set(WITH_HTTP 1)
+set(WITH_VALID 1)
+set(WITH_HTML 1)
+set(WITH_LEGACY 1)
+set(WITH_C14N 1)
+set(WITH_CATALOG 1)
+set(WITH_DOCB 1)
+set(WITH_XPATH 1)
+set(WITH_XPTR 1)
+set(WITH_XINCLUDE 1)
+set(WITH_ICONV 1)
+set(WITH_ICU 0)
+set(WITH_ISO8859X 1)
+set(WITH_DEBUG 1)
+set(WITH_MEM_DEBUG 0)
+set(WITH_RUN_DEBUG 0)
+set(WITH_REGEXPS 1)
+set(WITH_SCHEMAS 1)
+set(WITH_SCHEMATRON 1)
+set(WITH_MODULES 1)
+set(MODULE_EXTENSION ".so")
+set(WITH_ZLIB 1)
+set(WITH_LZMA 1)
+
+if(CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
+    set(WITH_CATALOG 0)
+    set(WITH_MODULES 0)
+endif()
+
+message(STATUS "Generating xmlversion.h")
+
+configure_file(include/libxml/xmlversion.h.in include/libxml/xmlversion.h)
+
 add_library(libxml2 ${SOURCES})
 if(INSTALL_HEADERS)
-    file(GLOB PUBLIC_HEADERS include/libxml/*.h)
+    file(GLOB PUBLIC_HEADERS include/libxml/*.h ${CMAKE_CURRENT_BINARY_DIR}/include/libxml/xmlversion.h)
     list(FILTER PUBLIC_HEADERS EXCLUDE REGEX "xmlexports\\.h$")
     list(APPEND PUBLIC_HEADERS ${CMAKE_CURRENT_BINARY_DIR}/xmlexports.h)
 
     set_target_properties(libxml2 PROPERTIES PUBLIC_HEADER "${PUBLIC_HEADERS}")
 endif()
-target_include_directories(libxml2 PRIVATE ${CMAKE_CURRENT_BINARY_DIR} include ${LIBLZMA_INCLUDE_DIRS})
+target_include_directories(libxml2 PRIVATE ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_BINARY_DIR}/include include ${LIBLZMA_INCLUDE_DIRS})
 target_link_libraries(libxml2 PRIVATE
     unofficial::iconv::libcharset unofficial::iconv::libiconv
     ZLIB::ZLIB
     ${LIBLZMA_LIBRARIES}
 )
-if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
+if(CMAKE_SYSTEM_NAME STREQUAL "Windows" OR CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
     target_include_directories(libxml2 PRIVATE win32/vc10)
     target_link_libraries(libxml2 PRIVATE
         wsock32.lib
@@ -55,6 +121,7 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
     )
     target_compile_definitions(libxml2 PRIVATE
         -DHAVE_WIN32_THREADS
+        _WINSOCK_DEPRECATED_NO_WARNINGS
     )
 endif()
 
diff --git a/ports/libxml2/CONTROL b/ports/libxml2/CONTROL
index f005d23676..d4b6c6b1b7 100644
--- a/ports/libxml2/CONTROL
+++ b/ports/libxml2/CONTROL
@@ -1,4 +1,4 @@
 Source: libxml2
-Version: 2.9.4-5
+Version: 2.9.9-4
 Description: Libxml2 is the XML C parser and toolkit developed for the Gnome project (but usable outside of the Gnome platform)
 Build-Depends: zlib, libiconv, liblzma
diff --git a/ports/libxml2/portfile.cmake b/ports/libxml2/portfile.cmake
index d55d4052de..de2dfe0afa 100644
--- a/ports/libxml2/portfile.cmake
+++ b/ports/libxml2/portfile.cmake
@@ -1,11 +1,12 @@
 include(vcpkg_common_functions)
-set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/libxml2-2.9.4)
-vcpkg_download_distfile(ARCHIVE
-    URLS "ftp://xmlsoft.org/libxml2/libxml2-2.9.4.tar.gz" "http://xmlsoft.org/sources/libxml2-2.9.4.tar.gz"
-    FILENAME "libxml2-2.9.4.tar.gz"
-    SHA512 f5174ab1a3a0ec0037a47f47aa47def36674e02bfb42b57f609563f84c6247c585dbbb133c056953a5adb968d328f18cbc102eb0d00d48eb7c95478389e5daf9
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO GNOME/libxml2
+    REF v2.9.9
+    SHA512 bfcc08bd033f538a968205f0f9e2da4c3438ec2f35f017289783903365e13ed93d83f2f63c7497344a362b7418170ee586a5ecb45493e30feaa0f62b22a57b54
+    HEAD_REF master
 )
-vcpkg_extract_source_archive(${ARCHIVE})
 
 file(COPY ${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt DESTINATION ${SOURCE_PATH})
 
@@ -19,8 +20,11 @@ vcpkg_configure_cmake(
 vcpkg_install_cmake()
 
 # Handle copyright
-file(COPY ${CMAKE_CURRENT_LIST_DIR}/usage ${SOURCE_PATH}/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/libxml2)
-file(RENAME ${CURRENT_PACKAGES_DIR}/share/libxml2/COPYING ${CURRENT_PACKAGES_DIR}/share/libxml2/copyright)
+configure_file(${SOURCE_PATH}/Copyright ${CURRENT_PACKAGES_DIR}/share/${PORT}/copyright COPYONLY)
+
+# Install usage
+file(COPY ${CMAKE_CURRENT_LIST_DIR}/usage
+    DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT})
 
 vcpkg_copy_pdbs()
 
diff --git a/ports/libxml2/vcpkg-cmake-wrapper.cmake b/ports/libxml2/vcpkg-cmake-wrapper.cmake
index 68bed6547f..b6ec9571a3 100644
--- a/ports/libxml2/vcpkg-cmake-wrapper.cmake
+++ b/ports/libxml2/vcpkg-cmake-wrapper.cmake
@@ -1,7 +1,10 @@
 _find_package(${ARGS})
 if(LibXml2_FOUND)
     find_package(LibLZMA)
-    list(APPEND LIBXML2_LIBRARIES ${LIBLZMA_LIBRARIES})
+    find_package(ZLIB)
+
+    list(APPEND LIBXML2_LIBRARIES ${LIBLZMA_LIBRARIES} ${ZLIB_LIBRARIES})
+
     if(CMAKE_SYSTEM_NAME STREQUAL "Windows" OR CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
         list(APPEND LIBXML2_LIBRARIES
             debug ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/debug/lib/libiconv.lib
@@ -9,5 +12,7 @@ if(LibXml2_FOUND)
             debug ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/debug/lib/libcharset.lib
             optimized ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/lib/libcharset.lib
             ws2_32)
+    elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+        list(APPEND LIBXML2_LIBRARIES m)
     endif()
 endif()