diff --git a/deps/libsoup3/README b/deps/libsoup3/README
new file mode 100644
index 0000000..dbdd712
--- /dev/null
+++ b/deps/libsoup3/README
@@ -0,0 +1,6 @@
+Soup is an HTTP client/server library implementation in C. It uses
+GObjects and the glib main loop to integrate well with GTK+
+applications, and has a synchronous API suitable for use in threaded
+applications.
+
+NOTE: This package can co-exist with libsoup package in Slackware.
diff --git a/deps/libsoup3/libsoup3.SlackBuild b/deps/libsoup3/libsoup3.SlackBuild
new file mode 100644
index 0000000..9f3f3fb
--- /dev/null
+++ b/deps/libsoup3/libsoup3.SlackBuild
@@ -0,0 +1,112 @@
+#!/bin/bash
+
+# Slackware build script for libsoup3
+
+# Copyright 2022-2023 Willy Sudiarto Raharjo <willysr@slackbuilds.org>
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# 20220422 bkw: Modified by SlackBuilds.org: fix PRINT_PACKAGE_NAME.
+
+cd $(dirname $0) ; CWD=$(pwd)
+
+PRGNAM=libsoup3
+SRCNAM=libsoup
+VERSION=${VERSION:-3.4.4}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_msb}
+PKGTYPE=${PKGTYPE:-txz}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+wget -c https://gitlab.gnome.org/GNOME/libsoup/-/archive/3.4.4/libsoup-3.4.4.tar.bz2
+
+if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
+  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
+  exit 0
+fi
+
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $SRCNAM-$VERSION
+tar xvf $CWD/$SRCNAM-$VERSION.tar.bz2
+cd $SRCNAM-$VERSION
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \+ -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \+
+
+mkdir build
+cd build
+  CFLAGS="$SLKCFLAGS" \
+  CXXFLAGS="$SLKCFLAGS" \
+  meson .. \
+    --buildtype=release \
+    --infodir=/usr/info \
+    --libdir=/usr/lib${LIBDIRSUFFIX} \
+    --localstatedir=/var \
+    --mandir=/usr/man \
+    --prefix=/usr \
+    -Dtests=FALSE \
+    -Dsysprof="disabled" \
+    -Dstrip=true \
+    -Ddocs="disabled" \
+    --sysconfdir=/etc
+  ninja
+  DESTDIR=$PKG ninja install
+cd ..
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a AUTHORS COPYING NEWS README docs examples $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE
diff --git a/deps/libsoup3/slack-desc b/deps/libsoup3/slack-desc
new file mode 100644
index 0000000..6d0d78a
--- /dev/null
+++ b/deps/libsoup3/slack-desc
@@ -0,0 +1,12 @@
+        |-----handy-ruler------------------------------------------------------|
+libsoup3: libsoup3 (an HTTP client/server library)
+libsoup3:
+libsoup3: Soup is an HTTP client/server library implementation in C. It uses
+libsoup3: GObjects and the glib main loop to integrate well with GTK+
+libsoup3: applications, and has a synchronous API suitable for use in threaded
+libsoup3: applications.
+libsoup3:
+libsoup3:
+libsoup3:
+libsoup3:
+libsoup3:
diff --git a/mate-build-deps.sh b/mate-build-deps.sh
index 2da33c8..162c004 100755
--- a/mate-build-deps.sh
+++ b/mate-build-deps.sh
@@ -53,6 +53,7 @@ for dir in \
   deps/libpeas \
   deps/libgksu \
   deps/gksu \
+  deps/libsoup3 \
   deps/gssdp \
   deps/gupnp \
   deps/libgxps \