diff --git a/sushi-port-to-gtksourceview4.patch b/sushi-port-to-gtksourceview4.patch
new file mode 100644
index 0000000..d4479c2
--- /dev/null
+++ b/sushi-port-to-gtksourceview4.patch
@@ -0,0 +1,98 @@
+From 8b2ec7f5e6ad39e04aa9bd562022d66163f50d19 Mon Sep 17 00:00:00 2001
+From: Joel Ong <joel.ong@yale.edu>
+Date: Mon, 1 Apr 2019 14:26:02 -0400
+Subject: [PATCH] workaround for having both gtksourceview 3 and 4 installed.
+ Fixes #12.
+
+---
+ src/js/viewers/text.js | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/js/viewers/text.js b/src/js/viewers/text.js
+index 86a53b7..9566adb 100644
+--- a/src/js/viewers/text.js
++++ b/src/js/viewers/text.js
+@@ -23,6 +23,8 @@
+  *
+  */
+ 
++imports.gi.versions.GtkSource = '3.0';
++
+ const Gdk = imports.gi.Gdk;
+ const GtkClutter = imports.gi.GtkClutter;
+ const Gtk = imports.gi.Gtk;
+-- 
+2.21.0
+
+From bafeb19233325a7fc7c2e82b488abfb7a7556f61 Mon Sep 17 00:00:00 2001
+From: Martin Blanchard <tchaik@gmx.com>
+Date: Sun, 19 May 2019 22:31:37 +0200
+Subject: [PATCH] Port to GtkSourceView 4
+
+GtkSourceView 3 isn't maintained any more.
+
+https://gitlab.gnome.org/GNOME/sushi/issues/6
+---
+ flatpak/org.gnome.NautilusPreviewer.json | 4 ++--
+ meson.build                              | 2 +-
+ src/js/viewers/text.js                   | 2 +-
+ src/libsushi/meson.build                 | 2 +-
+ 4 files changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/flatpak/org.gnome.NautilusPreviewer.json b/flatpak/org.gnome.NautilusPreviewer.json
+index 4565b82..9a60827 100644
+--- a/flatpak/org.gnome.NautilusPreviewer.json
++++ b/flatpak/org.gnome.NautilusPreviewer.json
+@@ -102,8 +102,8 @@
+             "sources": [
+                 {
+                     "type": "archive",
+-                    "url": "http://download.gnome.org/sources/gtksourceview/3.24/gtksourceview-3.24.8.tar.xz",
+-                    "sha256": "1e9bb8ff190db705deb916dd23ff681f0e8803aec407bf0fd64c7e615ac436fe"
++                    "url": "https://download.gnome.org/sources/gtksourceview/4.2/gtksourceview-4.2.0.tar.xz",
++                    "sha256": "c431eb234dc83c7819e58f77dd2af973252c7750da1c9d125ddc94268f94f675"
+                 }
+             ]
+         },
+diff --git a/meson.build b/meson.build
+index 56398d9..538dc4b 100644
+--- a/meson.build
++++ b/meson.build
+@@ -19,7 +19,7 @@ gstreamer_base_dep = dependency('gstreamer-base-1.0')
+ gstreamer_pbutils_dep = dependency('gstreamer-pbutils-1.0')
+ gstreamer_tag_dep = dependency('gstreamer-tag-1.0')
+ gtk_dep = dependency('gtk+-3.0', version: '>=3.13.2')
+-gtksourceview_dep = dependency('gtksourceview-3.0')
++gtksourceview_dep = dependency('gtksourceview-4', version: '>=4.0.3')
+ harfbuzz_dep = dependency('harfbuzz', version: '>=0.9.9')
+ introspection_dep = dependency('gobject-introspection-1.0', version: '>=1.0.1')
+ musicbrainz_dep = dependency('libmusicbrainz5')
+diff --git a/src/js/viewers/text.js b/src/js/viewers/text.js
+index 9566adb..a044fbe 100644
+--- a/src/js/viewers/text.js
++++ b/src/js/viewers/text.js
+@@ -23,7 +23,7 @@
+  *
+  */
+ 
+-imports.gi.versions.GtkSource = '3.0';
++imports.gi.versions.GtkSource = '4';
+ 
+ const Gdk = imports.gi.Gdk;
+ const GtkClutter = imports.gi.GtkClutter;
+diff --git a/src/libsushi/meson.build b/src/libsushi/meson.build
+index c8ff6fa..66ef646 100644
+--- a/src/libsushi/meson.build
++++ b/src/libsushi/meson.build
+@@ -62,7 +62,7 @@ gnome.generate_gir(
+     'GstTag-1.0',
+     'GdkPixbuf-2.0',
+     'Gtk-3.0',
+-    'GtkSource-3.0',
++    'GtkSource-4',
+     'EvinceDocument-3.0',
+   ],
+   install: true,
+-- 
+2.21.0
+
diff --git a/sushi.changes b/sushi.changes
index 7398150..546b4ac 100644
--- a/sushi.changes
+++ b/sushi.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Tue Jun 18 20:08:08 UTC 2019 - Bjørn Lie <bjorn.lie@gmail.com>
+
+- Add sushi-port-to-gtksourceview4.patch: Port to gtksourceview4.
+  Following this patch, replace pkgconfig(gtksourceview-3.0) with
+  pkgconfig(gtksourceview-4) BuildRequires.
+
 -------------------------------------------------------------------
 Sun Mar 10 13:00:13 UTC 2019 - Bjørn Lie <bjorn.lie@gmail.com>
 
diff --git a/sushi.spec b/sushi.spec
index ecc6539..4798522 100644
--- a/sushi.spec
+++ b/sushi.spec
@@ -24,6 +24,8 @@ License:        SUSE-GPL-2.0-with-plugin-exception
 Group:          Productivity/File utilities
 URL:            https://www.gnome.org
 Source0:        https://download.gnome.org/sources/sushi/3.32/%{name}-%{version}.tar.xz
+# PATCH-FIX-UPSTREAM sushi-port-to-gtksourceview4.patch -- Port to gtksourceview4
+Patch0:         sushi-port-to-gtksourceview4.patch
 
 BuildRequires:  meson
 BuildRequires:  pkgconfig
@@ -41,7 +43,7 @@ BuildRequires:  pkgconfig(gstreamer-1.0)
 BuildRequires:  pkgconfig(gstreamer-pbutils-1.0)
 BuildRequires:  pkgconfig(gstreamer-tag-1.0)
 BuildRequires:  pkgconfig(gtk+-3.0) >= 3.13.2
-BuildRequires:  pkgconfig(gtksourceview-3.0)
+BuildRequires:  pkgconfig(gtksourceview-4) >= 4.0.3
 BuildRequires:  pkgconfig(harfbuzz) >= 0.9.9
 BuildRequires:  pkgconfig(libmusicbrainz5)
 BuildRequires:  pkgconfig(webkit2gtk-4.0)