diff --git a/0001-make-constructors-of-abstract-classes-protected.patch b/0001-make-constructors-of-abstract-classes-protected.patch
deleted file mode 100644
index 2a969a7..0000000
--- a/0001-make-constructors-of-abstract-classes-protected.patch
+++ /dev/null
@@ -1,79 +0,0 @@
-From f10e917b252a809daf9f7650011f68edc6be81b0 Mon Sep 17 00:00:00 2001
-From: Evgeny Stambulchik <fnevgeny@gmail.com>
-Date: Sun, 4 Aug 2019 00:50:34 +0300
-Subject: [PATCH] Make constructors of abstract classes protected
-
-This should fix #445.
----
- src/classes/action/action_mapping.vala | 2 +-
- src/classes/drawings/storage.vala      | 2 +-
- src/classes/renderer/cache/base.vala   | 2 +-
- src/classes/timer_label.vala           | 2 +-
- src/classes/view/behaviour/base.vala   | 2 +-
- 5 files changed, 5 insertions(+), 5 deletions(-)
-
-diff --git a/src/classes/action/action_mapping.vala b/src/classes/action/action_mapping.vala
-index 780f80a..0abc307 100644
---- a/src/classes/action/action_mapping.vala
-+++ b/src/classes/action/action_mapping.vala
-@@ -48,7 +48,7 @@ namespace pdfpc {
-          * methods, and we need blank objects to call them.  Thus, this blank
-          * constructor.
-          */
--        public ActionMapping() {
-+        protected ActionMapping() {
-             base();
-         }
- 
-diff --git a/src/classes/drawings/storage.vala b/src/classes/drawings/storage.vala
-index 6c6e7f9..e5ceaa9 100644
---- a/src/classes/drawings/storage.vala
-+++ b/src/classes/drawings/storage.vala
-@@ -35,7 +35,7 @@ namespace pdfpc.Drawings.Storage {
-          */
-         protected Metadata.Pdf metadata;
- 
--        public Base(Metadata.Pdf metadata) {
-+        protected Base(Metadata.Pdf metadata) {
-             this.metadata = metadata;
-         }
- 
-diff --git a/src/classes/renderer/cache/base.vala b/src/classes/renderer/cache/base.vala
-index d60730e..2dc39ac 100644
---- a/src/classes/renderer/cache/base.vala
-+++ b/src/classes/renderer/cache/base.vala
-@@ -37,7 +37,7 @@ namespace pdfpc.Renderer.Cache {
-         /**
-          * Initialize the cache store
-          */
--        public Base(Metadata.Pdf metadata) {
-+        protected Base(Metadata.Pdf metadata) {
-             this.metadata = metadata;
-         }
- 
-diff --git a/src/classes/timer_label.vala b/src/classes/timer_label.vala
-index 8b55acc..8d689e1 100644
---- a/src/classes/timer_label.vala
-+++ b/src/classes/timer_label.vala
-@@ -95,7 +95,7 @@ namespace pdfpc {
-          * Default constructor taking the initial time as argument, as well as
-          * the time to countdown until the talk actually starts.
-          */
--        public TimerLabel(PresentationController controller, time_t start_time = 0) {
-+        protected TimerLabel(PresentationController controller, time_t start_time = 0) {
-             this.controller = controller;
-             this.start_time = start_time;
-         }
-diff --git a/src/classes/view/behaviour/base.vala b/src/classes/view/behaviour/base.vala
-index 4382ba6..46c8808 100644
---- a/src/classes/view/behaviour/base.vala
-+++ b/src/classes/view/behaviour/base.vala
-@@ -41,7 +41,7 @@ namespace pdfpc.View {
-         /**
-          * Base constructor not taking any arguments
-          */
--        public Base() {
-+        protected Base() {
-             // Nothing to do here
-         }
- 
diff --git a/pdfpc.spec b/pdfpc.spec
index 704b11b..4fb7bed 100644
--- a/pdfpc.spec
+++ b/pdfpc.spec
@@ -1,13 +1,15 @@
 Name:                pdfpc
-Version:             4.3.4
-Release:             2
+Version:             4.5.0
+Release:             1
 Summary:             A GTK based presentation viewer application for GNU/Linux
 License:             GPLv2+
 URL:                 https://%{name}.github.io/
 Source0:             https://github.com/%{name}/%{name}/archive/v%{version}.tar.gz
-Patch0:              0001-make-constructors-of-abstract-classes-protected.patch
 BuildRequires:       cmake gcc gtk3-devel gstreamer1-devel gstreamer1-plugins-base-devel
 BuildRequires:       librsvg2-devel libgee-devel pango-devel poppler-glib-devel vala vala-devel
+BuildRequires:       json-glib-devel
+BuildRequires:       libmarkdown-devel
+BuildRequires:       webkit2gtk3-devel
 
 %description
 pdfpc is a GTK based presentation viewer application for GNU/Linux which uses
@@ -30,7 +32,7 @@ make %{?_smp_mflags}
 %make_install
 
 %files
-%doc README.rst CHANGELOG.txt
+%doc README.rst CHANGELOG.rst
 %{_bindir}/%{name}
 %license LICENSE.txt
 %config(noreplace) %{_sysconfdir}/%{name}rc
@@ -39,6 +41,9 @@ make %{?_smp_mflags}
 %{_datadir}/pixmaps/%{name}
 
 %changelog
+* Tue Jan 04 2022 yaoxin <yaoxin30@huawei.com> - 4.5.0-1
+- Upgrade pdfpc to 4.5.0
+
 * Fri Jul 30 2021 chenyanpanHW <chenyanpan@huawei.com> - 4.3.4-2
 - DESC: delete -S git from %autosetup, and delete BuildRequires git-core
 
diff --git a/v4.3.4.tar.gz b/v4.3.4.tar.gz
deleted file mode 100644
index 0d60e64..0000000
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diff --git a/v4.5.0.tar.gz b/v4.5.0.tar.gz
new file mode 100644
index 0000000..e82d360
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