diff --git a/libraries/qt5/README b/libraries/qt5/README
index e1376a9998..ac0c8c5623 100644
--- a/libraries/qt5/README
+++ b/libraries/qt5/README
@@ -4,8 +4,8 @@ is its rich set of widgets that provide standard GUI functionality.
 Optional dependencies: unixodbc, libxkbcommon, freetds, pulseaudio,
 OpenAL, libwebp and postgresql
 
-Optional dependencies: wayland, openvg and firebird (not available at
-slackbuilds.org)
+Optional dependencies: wayland, openvg, libinput and firebird (not available
+at slackbuilds.org)
 
 Note: To build Qt5 with Pulseadio then pass USEPULSE=yes to the slackbuild.
 
diff --git a/libraries/qt5/patches/qt5.pulseaudio.diff b/libraries/qt5/patches/qt5.pulseaudio.diff
new file mode 100644
index 0000000000..8d8f616d5b
--- /dev/null
+++ b/libraries/qt5/patches/qt5.pulseaudio.diff
@@ -0,0 +1,12 @@
+--- qt-everywhere-opensource-src-5.4.0/qtwebengine/src/3rdparty/chromium/media/media.gyp.orig     2014-12-05 17:26:44.000000000 +0100
++++ qt-everywhere-opensource-src-5.4.0/qtwebengine/src/3rdparty/chromium/media/media.gyp  2014-12-12 10:27:20.393735405 +0100
+@@ -29,7 +29,7 @@
+           ['use_cras==1', {
+             'use_pulseaudio%': 0,
+           }, {
+-            'use_pulseaudio%': 1,
++            'use_pulseaudio%': 0,
+           }],
+         ],
+       }, {
+
diff --git a/libraries/qt5/qt5.SlackBuild b/libraries/qt5/qt5.SlackBuild
index 4896c2c8ec..3d49762b89 100644
--- a/libraries/qt5/qt5.SlackBuild
+++ b/libraries/qt5/qt5.SlackBuild
@@ -46,7 +46,7 @@
 # tailored to Qt 5. Modified by Larry Hajali.
 
 PRGNAM=qt5
-VERSION=${VERSION:-5.4.2}
+VERSION=${VERSION:-5.5.0}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 
@@ -91,11 +91,6 @@ cd $TMP
 rm -rf ${PRGNAM/5/}-everywhere-opensource-src-$VERSION
 tar xvf $CWD/${PRGNAM/5/}-everywhere-opensource-src-$VERSION.tar.xz
 cd ${PRGNAM/5/}-everywhere-opensource-src-$VERSION
-# Fix dangling symlinks.
-rm -f qtwebengine/src/3rdparty/chromium/third_party/mesa/src/src/gallium/state_trackers/d3d1x/w32api
-rm -f qtwebengine/src/3rdparty/chromium/third_party/webrtc/tools/e2e_quality/audio/perf
-ln -s ../../../../../tools/perf\
-  qtwebengine/src/3rdparty/chromium/third_party/webrtc/tools/e2e_quality/audio/perf
 chown -R root:root .
 find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
@@ -118,9 +113,7 @@ else
   RELOCATIONS=""
 fi
 
-if echo "$ARCH" | grep -q "i.86" 2>/dev/null; then
-  sed -i "/^QMAKE_CFLAGS_RELEASE/ s|+=.*|+= $SLKCFLAGS|" qtbase/mkspecs/common/gcc-base.conf
-fi
+sed -i "s|-O2|$SLKCFLAGS|" qtbase/mkspecs/common/gcc-base.conf
 
 # Use Pulseaudio. Default is not to use Pulseaudio. Pulseaudio is a
 # required dependency for the new qtwebengine.
@@ -129,7 +122,7 @@ if [ "${USEPULSE:-no}" == "yes" ]; then
   PULSE="-pulseaudio"
 else
   PULSE="-no-pulseaudio"
-  sed -i '/qtwebengine/d' qt.pro
+  patch -p1 < $CWD/patches/qt5.pulseaudio.diff
 fi
 
 # Build examples. Default is no.
@@ -141,7 +134,6 @@ fi
 
 export CFLAGS="$SLKCFLAGS"
 export CXXFLAGS="$SLKCFLAGS"
-export OPENSOURCE_CXXFLAGS="$SLKCFLAGS"
 ./configure -v \
   -confirm-license \
   -opensource \
@@ -239,7 +231,7 @@ Description: Qt5 Configuration
 Version: $VERSION
 EOF
 
-# Fix internal linking for Qt5WebKit.pc.
+# Fix internal linking for Qt5WebKit.pc and Qt5WebEngineCore.pc.
 sed -i \
   -e "s|-Wl,-whole-archive -lWebKit1 -Wl,-no-whole-archive -L${PWD}/qtwebkit/Source/WebKit[^ ]* ||" \
   -e "s|-Wl,-whole-archive -lWebKit2 -Wl,-no-whole-archive -L${PWD}/qtwebkit/Source/WebKit2[^ ]* ||" \
@@ -250,6 +242,8 @@ sed -i \
   -e "s|-Wl,-whole-archive -lleveldb -Wl,-no-whole-archive -L${PWD}/qtwebkit/Source/ThirdParty/leveldb[^ ]* ||" \
   $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig/Qt5WebKit.pc
 
+sed -i 's|-Wl,--whole-archive.*-Wl,--no-whole-archive||' $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig/Qt5WebEngineCore.pc
+
 # While we are at it, there isn't any reason to keep references to $PKG in the *.prl files.
 for PRL in $(find $PKG -name "*\.prl"); do
   sed -i '/^QMAKE_PRL_BUILD_DIR/d' $PRL
@@ -266,6 +260,10 @@ sed -i "s|@LIBDIR@|$LIBDIRSUFFIX|" $PKG/usr/share/applications/*
 
 # Currently not working for qt version 5.4.0.  Extra layer added to *.ico file
 # freaks out ImageMagick and fails image conversion.
+# Eg.
+#   $ convert assistant.ico -resize 96x96! assistant.png
+#     convert: file format version mismatch `assistant.ico' @ error/xwd.c/ReadXWDImage/241.
+#     convert: no images defined `assistant.png' @ error/convert.c/ConvertImageCommand/3127.
 #for i in $(find . -name "assistant.ico" -o -name "designer.ico" \
 #  -o -name "linguist.ico" -o -name "qdbusviewer.ico"); do
 #  for j in 16 24 32 48 64 96 128; do
diff --git a/libraries/qt5/qt5.info b/libraries/qt5/qt5.info
index 09e30d0979..ba66b798b3 100644
--- a/libraries/qt5/qt5.info
+++ b/libraries/qt5/qt5.info
@@ -1,8 +1,8 @@
 PRGNAM="qt5"
-VERSION="5.4.2"
+VERSION="5.5.0"
 HOMEPAGE="http://qt-project.org/"
-DOWNLOAD="http://download.qt-project.org/official_releases/qt/5.4/5.4.2/single/qt-everywhere-opensource-src-5.4.2.tar.xz"
-MD5SUM="c23bd0f14d66e7901d24906a1edce9b0"
+DOWNLOAD="http://download.qt-project.org/official_releases/qt/5.5/5.5.0/single/qt-everywhere-opensource-src-5.5.0.tar.xz"
+MD5SUM="65d5282f3dee0336da9ed1f77148952f"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
 REQUIRES=""