diff --git a/qtwebkit-5.9.0-icu-59.patch b/qtwebkit-5.9.0-icu-59.patch
new file mode 100644
index 0000000..2ad514c
--- /dev/null
+++ b/qtwebkit-5.9.0-icu-59.patch
@@ -0,0 +1,73 @@
+diff --git a/Source/WTF/wtf/Compiler.h b/Source/WTF/wtf/Compiler.h
+index ead844f..e62cfd4 100644
+--- a/Source/WTF/wtf/Compiler.h
++++ b/Source/WTF/wtf/Compiler.h
+@@ -61,6 +61,7 @@
+ #define WTF_COMPILER_SUPPORTS_HAS_TRIVIAL_DESTRUCTOR __has_feature(has_trivial_destructor)
+ #define WTF_COMPILER_SUPPORTS_CXX_STRONG_ENUMS __has_feature(cxx_strong_enums)
+ #define WTF_COMPILER_SUPPORTS_CXX_REFERENCE_QUALIFIED_FUNCTIONS __has_feature(cxx_reference_qualified_functions)
++#define WTF_COMPILER_SUPPORTS_CXX_NEW_CHAR_TYPES !defined(_LIBCPP_HAS_NO_UNICODE_CHARS)
+ 
+ #endif
+ 
+@@ -142,6 +143,7 @@
+ #define WTF_COMPILER_SUPPORTS_CXX_DELETED_FUNCTIONS 1
+ #endif
+ #if GCC_VERSION_AT_LEAST(4, 5, 0)
++#define WTF_COMPILER_SUPPORTS_CXX_NEW_CHAR_TYPES 1
+ #define WTF_COMPILER_SUPPORTS_CXX_EXPLICIT_CONVERSIONS 1
+ #endif
+ #if GCC_VERSION_AT_LEAST(4, 6, 0)
+diff --git a/Source/WTF/wtf/TypeTraits.h b/Source/WTF/wtf/TypeTraits.h
+index b9e46bc..876fa45 100644
+--- a/Source/WTF/wtf/TypeTraits.h
++++ b/Source/WTF/wtf/TypeTraits.h
+@@ -75,6 +75,10 @@ namespace WTF {
+ #if !COMPILER(MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
+     template<> struct IsInteger<wchar_t>            { static const bool value = true; };
+ #endif
++#if COMPILER_SUPPORTS(CXX_NEW_CHAR_TYPES)
++    template<> struct IsInteger<char16_t>           { static const bool value = true; };
++    template<> struct IsInteger<char32_t>           { static const bool value = true; };
++#endif
+ 
+     template<typename T> struct IsFloatingPoint     { static const bool value = false; };
+     template<> struct IsFloatingPoint<float>        { static const bool value = true; };
+---qtwebkit-opensource-src-5.5.1/Source/JavaScriptCore/API/JSStringRef.h.orig	2015-10-13 06:37:10.000000000 +0200
++++ qtwebkit-opensource-src-5.5.1/Source/JavaScriptCore/API/JSStringRef.h	2017-04-24 12:26:42.495345570 +0200
+@@ -32,6 +32,7 @@
+ #include <stdbool.h>
+ #endif
+ #include <stddef.h> /* for size_t */
++#include <uchar.h>
+ 
+ #ifdef __cplusplus
+ extern "C" {
+@@ -43,7 +44,7 @@
+ @typedef JSChar
+ @abstract A Unicode character.
+ */
+-    typedef unsigned short JSChar;
++    typedef char16_t JSChar;
+ #else
+     typedef wchar_t JSChar;
+ #endif
+--- qtwebkit-opensource-src-5.5.1/Source/WebKit2/Shared/API/c/WKString.h.orig	2015-10-13 06:37:12.000000000 +0200
++++ qtwebkit-opensource-src-5.5.1/Source/WebKit2/Shared/API/c/WKString.h	2017-04-24 12:27:33.432011867 +0200
+@@ -31,6 +31,7 @@
+ #ifndef __cplusplus
+ #include <stdbool.h>
+ #endif
++#include <uchar.h>
+ 
+ #ifdef __cplusplus
+ extern "C" {
+@@ -38,7 +39,7 @@
+ 
+ #if !defined(WIN32) && !defined(_WIN32) \
+     && !((defined(__CC_ARM) || defined(__ARMCC__)) && !defined(__linux__)) /* RVCT */
+-    typedef unsigned short WKChar;
++    typedef char16_t WKChar;
+ #else
+     typedef wchar_t WKChar;
+ #endif
diff --git a/qtwebkit.spec b/qtwebkit.spec
index 697e57b..fe02b64 100644
--- a/qtwebkit.spec
+++ b/qtwebkit.spec
@@ -1,13 +1,15 @@
+%define majver %(echo %version | cut -d. -f1-2)
 Name:          qtwebkit
-Version:       5.6.0
-Release:       2mamba
+Version:       5.9.0
+Release:       1mamba
 Summary:       A Qt based web browser engine
 Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           http://qt.io
-Source:        http://download.qt.io/community_releases/5.6/%{version}/qtwebkit-opensource-src-%{version}.tar.xz
+Source:        http://download.qt.io/community_releases/%{majver}/%{version}-final/qtwebkit-opensource-src-%{version}.tar.xz
+Patch0:        qtwebkit-5.9.0-icu-59.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -60,6 +62,7 @@ This package contains libraries and header files for developing applications tha
 %prep
 %setup -q -n qtwebkit-opensource-src-%{version}
 #-D -T
+%patch0 -p1
 
 %build
 #:<< _EOF
@@ -105,6 +108,9 @@ qmake-qt5
 %{_libdir}/cmake/Qt5WebKitWidgets/Qt5WebKit*.cmake
 
 %changelog
+* Thu Oct 26 2017 Silvan Calarco <silvan.calarco@mambasoft.it> 5.9.0-1mamba
+- update to 5.9.0
+
 * Sat Jun 04 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 5.6.0-2mamba
 - ensure rebuild against Qt 6.1.0