diff --git a/qtwebkit-5.212-bison-3.7.patch b/qtwebkit-5.212-bison-3.7.patch
new file mode 100644
index 0000000..7dec6e4
--- /dev/null
+++ b/qtwebkit-5.212-bison-3.7.patch
@@ -0,0 +1,31 @@
+diff --git a/Source/WebCore/css/makegrammar.pl b/Source/WebCore/css/makegrammar.pl
+index 5d63b08102eb..9435701c7061 100644
+--- a/Source/WebCore/css/makegrammar.pl
++++ b/Source/WebCore/css/makegrammar.pl
+@@ -73,25 +73,6 @@
+ }
+ 
+ my $fileBase = File::Spec->join($outputDir, $filename);
+-my @bisonCommand = ($bison, "-d", "-p", $symbolsPrefix, $grammarFilePath, "-o", "$fileBase.cpp");
++my @bisonCommand = ($bison, "--defines=$fileBase.h", "-p", $symbolsPrefix, $grammarFilePath, "-o", "$fileBase.cpp");
+ push @bisonCommand, "--no-lines" if $^O eq "MSWin32"; # Work around bug in bison >= 3.0 on Windows where it puts backslashes into #line directives.
+ system(@bisonCommand) == 0 or die;
+-
+-open HEADER, ">$fileBase.h" or die;
+-print HEADER << "EOF";
+-#ifndef CSSGRAMMAR_H
+-#define CSSGRAMMAR_H
+-EOF
+-
+-open HPP, "<$fileBase.cpp.h" or open HPP, "<$fileBase.hpp" or die;
+-while (<HPP>) {
+-    print HEADER;
+-}
+-close HPP;
+-
+-print HEADER "#endif\n";
+-close HEADER;
+-
+-unlink("$fileBase.cpp.h");
+-unlink("$fileBase.hpp");
+-
diff --git a/qtwebkit.spec b/qtwebkit.spec
index 3ef141d..18c91c9 100644
--- a/qtwebkit.spec
+++ b/qtwebkit.spec
@@ -1,7 +1,7 @@
 %define majver %(echo %version | cut -d. -f1-2)
 Name:          qtwebkit
 Epoch:         1
-Version:       5.13.1
+Version:       5.212
 Release:       1mamba
 Summary:       A Qt based web browser engine
 Group:         System/Libraries
@@ -9,10 +9,11 @@ Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           http://qt.io
-Source:        http://download.qt.io/snapshots/ci/qtwebkit/5.212/latest/src/submodules/qtwebkit-everywhere-src-%{version}.tar.xz
+Source:        http://download.qt.io/snapshots/ci/qtwebkit/5.212/latest/src/submodules/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
 Patch1:        qtwebkit-5.212-add-missing-include-functional.patch
+Patch2:        qtwebkit-5.212-bison-3.7.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -37,7 +38,7 @@ BuildRequires: libxml2-devel
 BuildRequires: libxslt-devel
 BuildRequires: libz-devel
 ## AUTOBUILDREQ-END
-BuildRequires: libqt5-devel >= 5.14
+BuildRequires: libqt5-devel >= 5.15
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
@@ -66,14 +67,13 @@ This package contains libraries and header files for developing applications tha
 %debug_package
 
 %prep
-%setup -q -n qtwebkit-everywhere-src-%{version}
-#-D -T
-#:<< _EOF
+%setup -q -n qtwebkit-opensource-src-%{version} -D -T
+:<< _EOF
 #%patch0 -p1
 #%patch1 -p1
+%patch2 -p1
 
 %build
-#:<< _EOF
 #qmake-qt5
 %cmake -d build \
    -DPORT="Qt" \
@@ -86,7 +86,7 @@ This package contains libraries and header files for developing applications tha
    -DENABLE_JIT=OFF
 %endif
 
-%make -j1
+%make -j2
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
@@ -129,6 +129,9 @@ This package contains libraries and header files for developing applications tha
 %{_libdir}/cmake/Qt5WebKit/WebKit*.cmake
 
 %changelog
+* Fri Sep 04 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 5.212-1mamba
+- update to 5.212
+
 * Wed Apr 15 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 5.13.1-1mamba
 - update to 5.13.1