diff --git a/ac/qt4.m4 b/ac/qt5.m4
similarity index 86%
rename from ac/qt4.m4
rename to ac/qt5.m4
index e997589c6..3607deab6 100644
--- a/ac/qt4.m4
+++ b/ac/qt5.m4
@@ -1,11 +1,11 @@
 dnl
-dnl Check for Qt 4 or newer
+dnl Check for Qt 5
 dnl
 
 AC_ARG_ENABLE([qt],
   AC_HELP_STRING([--enable-qt],[compile the Qt version of the GUIs (no)]))
 
-qt_min_ver=4.7.0
+qt_min_ver=5.0.0
 
 if test x"$enable_qt" = "xyes" -a \
   '(' x"$enable_gui" = x"yes" -o x"$enable_gui" = "x" ')'; then
@@ -17,7 +17,7 @@ if test x"$enable_qt" = "xyes" -a \
     AC_MSG_CHECKING(for moc)
     AC_MSG_RESULT(using supplied $MOC)
   else
-    AC_PATH_PROG(MOC, moc-qt4,, $PATH)
+    AC_PATH_PROG(MOC, moc-qt5,, $PATH)
     if test -z "$MOC"; then
       AC_PATH_PROG(MOC, moc,, $PATH)
     fi
@@ -29,7 +29,7 @@ if test x"$enable_qt" = "xyes" -a \
 
   dnl Check its version.
   AC_MSG_CHECKING(for the Qt version $MOC uses)
-  moc_ver=`"$MOC" -v 2>&1 | sed -e 's:.*Qt ::' -e 's:[[^0-9\.]]::g'`
+  moc_ver=`"$MOC" -v 2>&1 | sed -e 's:.*Qt ::' -e 's:.* ::' -e 's:[[^0-9\.]]::g'`
   if test -z "moc_ver"; then
     AC_MSG_RESULT(unknown; please contact the author)
     exit 1
@@ -49,7 +49,7 @@ if test x"$enable_qt" = "xyes" -a \
     AC_MSG_CHECKING(for uic)
     AC_MSG_RESULT(using supplied $UIC)
   else
-    AC_PATH_PROG(UIC, uic-qt4,, $PATH)
+    AC_PATH_PROG(UIC, uic-qt5,, $PATH)
     if test -z "$UIC"; then
       AC_PATH_PROG(UIC, uic,, $PATH)
     fi
@@ -61,7 +61,7 @@ if test x"$enable_qt" = "xyes" -a \
 
   dnl Check its version.
   AC_MSG_CHECKING(for the Qt version $UIC uses)
-  uic_ver=`"$UIC" -v 2>&1 | sed -e 's:.*Qt ::' -e 's:[[^0-9\.]]::g'`
+  uic_ver=`"$UIC" -v 2>&1 | sed -e 's:.*Qt ::' -e 's:.* ::' -e 's:[[^0-9\.]]::g'`
   if test -z "uic_ver"; then
     AC_MSG_RESULT(unknown; please contact the author)
     exit 1
@@ -81,7 +81,7 @@ if test x"$enable_qt" = "xyes" -a \
     AC_MSG_CHECKING(for rcc)
     AC_MSG_RESULT(using supplied $RCC)
   else
-    AC_PATH_PROG(RCC, rcc-qt4,, $PATH)
+    AC_PATH_PROG(RCC, rcc-qt5,, $PATH)
     if test -z "$RCC"; then
       AC_PATH_PROG(RCC, rcc,, $PATH)
     fi
@@ -93,7 +93,7 @@ if test x"$enable_qt" = "xyes" -a \
 
   dnl Check its version.
   AC_MSG_CHECKING(for the Qt version $RCC uses)
-  rcc_ver=`"$RCC" -v 2>&1 | sed -e 's:.*Qt ::' -e 's:[[^0-9\.]]::g'`
+  rcc_ver=`"$RCC" -v 2>&1 | sed -e 's:.*Qt ::' -e 's:.* ::' -e 's:[[^0-9\.]]::g'`
   if test -z "rcc_ver"; then
     AC_MSG_RESULT(unknown; please contact the author)
     exit 1
@@ -118,13 +118,13 @@ if test x"$enable_qt" = "xyes" -a \
   fi
 
   if test $ok = 1; then
-    PKG_CHECK_EXISTS([QtCore,QtGui],,[ok=0])
+    PKG_CHECK_EXISTS([QtCore,QtGui,QtWidgets],,[ok=0])
   fi
 
   if test $ok = 1; then
     dnl Try compiling and linking an application.
-    QT_CFLAGS="`$PKG_CONFIG QtCore --cflags` `pkg-config QtGui --cflags`"
-    QT_LIBS="`$PKG_CONFIG QtGui --libs`"
+    QT_CFLAGS="`$PKG_CONFIG --cflags Qt5Core Qt5Gui Qt5Widgets`"
+    QT_LIBS="`$PKG_CONFIG --libs Qt5Core Qt5Gui Qt5Widgets`"
 
     AC_LANG_PUSH(C++)
     AC_CACHE_VAL(am_cv_qt_compilation, [
@@ -132,7 +132,7 @@ if test x"$enable_qt" = "xyes" -a \
       while true; do
         ac_save_CXXFLAGS="$CXXFLAGS"
         ac_save_LIBS="$LIBS"
-        CXXFLAGS="$CXXFLAGS $QT_CFLAGS"
+        CXXFLAGS="$CXXFLAGS $QT_CFLAGS -fPIC"
         LIBS="$LDFLAGS $QT_LIBS"
         unset ac_cv_qt_compilation
 
@@ -165,8 +165,8 @@ return 0;
           set - $QT_CFLAGS
           while test ! -z "$1" ; do
             case "$1" in
-              -I*)
-                QT_CFLAGS="$QT_CFLAGS $1/QtCore $1/QtGui"
+              -I*qt*)
+                QT_CFLAGS="$QT_CFLAGS $1/QtCore $1/QtGui $1/QtWidgets"
                 ;;
             esac
             shift
@@ -174,7 +174,7 @@ return 0;
           run_qt_test=2
 
         elif test x"$run_qt_test" = "x2"; then
-          QT_CFLAGS="$QT_CFLAGS -I/usr/include/QtCore -I/usr/include/QtGui -I/usr/local/include/QtCore -I/usr/local/include/QtGui"
+          QT_CFLAGS="$QT_CFLAGS -I/usr/include/QtCore -I/usr/include/QtGui -I/usr/include/QtWidgets -I/usr/local/include/QtCore -I/usr/local/include/QtGui -I/usr/local/include/QtWidgets"
           run_qt_test=3
 
         else
diff --git a/configure.in b/configure.in
index fca9a72b1..aa87241da 100644
--- a/configure.in
+++ b/configure.in
@@ -37,7 +37,7 @@ m4_include(ac/matroska.m4)
 dnl m4_include(ac/ebml_matroska_internal.m4)
 m4_include(ac/zlib.m4)
 m4_include(ac/wxwidgets.m4)
-m4_include(ac/qt4.m4)
+m4_include(ac/qt5.m4)
 m4_include(ac/gnurx.m4)
 m4_include(ac/magic.m4)
 m4_include(ac/curl.m4)