diff --git a/wxmp3gain-4.0-src.tar.gz b/wxmp3gain-4.0-src.tar.gz
new file mode 100644
index 0000000..a9a963c
--- /dev/null
+++ b/wxmp3gain-4.0-src.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:10ffaf8f7cb1231df01ba40459e688112f8f0b35fea16076a5150bcb795e6d5f
+size 209292
diff --git a/wxmp3gain-docs.patch b/wxmp3gain-docs.patch
new file mode 100644
index 0000000..b1aba1f
--- /dev/null
+++ b/wxmp3gain-docs.patch
@@ -0,0 +1,12 @@
+Index: wxmp3gain-4.0/CMakeLists.txt
+===================================================================
+--- wxmp3gain-4.0.orig/CMakeLists.txt
++++ wxmp3gain-4.0/CMakeLists.txt
+@@ -35,7 +35,6 @@ target_link_libraries(wxmp3gain ${wxWidg
+ if(UNIX)
+     install(TARGETS "wxmp3gain" DESTINATION "bin")
+     install(DIRECTORY "resource/" DESTINATION "share/${PROJECT_NAME}/resource/")
+-    install(DIRECTORY "docs/" DESTINATION "share/doc/${PROJECT_NAME}/")
+     install(FILES "debian/menu/icon32x32.png" DESTINATION "share/icons/hicolor/32x32/apps/" RENAME "${PROJECT_NAME}.png")
+     install(FILES "debian/menu/icon48x48.png" DESTINATION "share/icons/hicolor/48x48/apps/" RENAME "${PROJECT_NAME}.png")
+     install(FILES "debian/menu/icon64x64.png" DESTINATION "share/icons/hicolor/64x64/apps/" RENAME "${PROJECT_NAME}.png")
diff --git a/wxmp3gain-makefile.patch b/wxmp3gain-makefile.patch
deleted file mode 100644
index 88defb4..0000000
--- a/wxmp3gain-makefile.patch
+++ /dev/null
@@ -1,91 +0,0 @@
-Index: wxmp3gain/makefile
-===================================================================
---- wxmp3gain.orig/makefile
-+++ wxmp3gain/makefile
-@@ -9,26 +9,26 @@ INSTALL_SHARE_DIR	= $(DESTDIR)$(PREFIX)/
- APP_SHARE_DIR = $(INSTALL_SHARE_DIR)/$(APP_NAME)
- DOC_SHARE_DIR = $(INSTALL_SHARE_DIR)/doc/$(APP_NAME)
- 
--COMMON_COMPILE_FLAGS = -Wall -ansi -pthread -O2
-+COMMON_COMPILE_FLAGS = -Wall -ansi -pthread -O2 $(RPM_OPT_FLAGS) -std=c++11
- COMMON_LINK_FLAGS    = -pthread -s
- 
- CPPFLAGS  = $(COMMON_COMPILE_FLAGS) `wx-config --cxxflags --debug=no --unicode=yes`
- LINKFLAGS = $(COMMON_LINK_FLAGS) `wx-config --libs std,aui --debug=no --unicode=yes`
- 
- all:
--	@g++ $(CPPFLAGS) -c $(SRC_DIR)/*.cpp
--	@g++ -o $(APP_NAME) *.o $(LINKFLAGS)
-+	g++ $(CPPFLAGS) -c $(SRC_DIR)/*.cpp
-+	g++ -o $(APP_NAME) *.o $(LINKFLAGS)
- 
--	@mkdir -p ./resource/msg/cs/
--	@mkdir -p ./resource/msg/de/
--	@mkdir -p ./resource/msg/es/
--	@mkdir -p ./resource/msg/pt_BR/
--	@mkdir -p ./resource/msg/ru/
--	@msgfmt ./msg/cs.po -o ./resource/msg/cs/$(APP_NAME).mo
--	@msgfmt ./msg/de.po -o ./resource/msg/de/$(APP_NAME).mo
--	@msgfmt ./msg/es.po -o ./resource/msg/es/$(APP_NAME).mo
--	@msgfmt ./msg/pt_BR.po -o ./resource/msg/pt_BR/$(APP_NAME).mo
--	@msgfmt ./msg/ru.po -o ./resource/msg/ru/$(APP_NAME).mo
-+	mkdir -p ./resource/msg/cs/
-+	mkdir -p ./resource/msg/de/
-+	mkdir -p ./resource/msg/es/
-+	mkdir -p ./resource/msg/pt_BR/
-+	mkdir -p ./resource/msg/ru/
-+	msgfmt ./msg/cs.po -o ./resource/msg/cs/$(APP_NAME).mo
-+	msgfmt ./msg/de.po -o ./resource/msg/de/$(APP_NAME).mo
-+	msgfmt ./msg/es.po -o ./resource/msg/es/$(APP_NAME).mo
-+	msgfmt ./msg/pt_BR.po -o ./resource/msg/pt_BR/$(APP_NAME).mo
-+	msgfmt ./msg/ru.po -o ./resource/msg/ru/$(APP_NAME).mo
- 
- clean:
- 	@rm -f *.o *.depend *.layout
-@@ -38,29 +38,25 @@ clean:
- 	@rm -f $(APP_NAME)
- 
- install:
--	@mkdir -p $(INSTALL_BIN_DIR)
--	@cp $(APP_NAME) $(INSTALL_BIN_DIR)
-+	mkdir -p $(INSTALL_BIN_DIR)
-+	cp $(APP_NAME) $(INSTALL_BIN_DIR)
- 
--	@mkdir -p $(APP_SHARE_DIR)
--	@cp -r ./resource $(APP_SHARE_DIR)
-+	mkdir -p $(APP_SHARE_DIR)
-+	cp -r ./resource $(APP_SHARE_DIR)
- 
--	@mkdir -p $(DOC_SHARE_DIR)
--	@cp -r ./docs/* $(DOC_SHARE_DIR)
--
--	@mkdir -p $(INSTALL_SHARE_DIR)/icons/hicolor/32x32/apps
--	@mkdir -p $(INSTALL_SHARE_DIR)/icons/hicolor/48x48/apps
--	@mkdir -p $(INSTALL_SHARE_DIR)/icons/hicolor/64x64/apps
--	@mkdir -p $(INSTALL_SHARE_DIR)/icons/hicolor/128x128/apps
--	@mkdir -p $(INSTALL_SHARE_DIR)/menu
--	@mkdir -p $(INSTALL_SHARE_DIR)/pixmaps
--	@mkdir -p $(INSTALL_SHARE_DIR)/applications
--	@cp ./debian/menu/icon32x32.png		$(INSTALL_SHARE_DIR)/icons/hicolor/32x32/apps/$(APP_NAME).png
--	@cp ./debian/menu/icon48x48.png		$(INSTALL_SHARE_DIR)/icons/hicolor/48x48/apps/$(APP_NAME).png
--	@cp ./debian/menu/icon64x64.png		$(INSTALL_SHARE_DIR)/icons/hicolor/64x64/apps/$(APP_NAME).png
--	@cp ./debian/menu/icon128x128.png	$(INSTALL_SHARE_DIR)/icons/hicolor/128x128/apps/$(APP_NAME).png
--	@cp ./debian/menu/icon.xpm		$(INSTALL_SHARE_DIR)/pixmaps/$(APP_NAME).xpm
--	@cp ./debian/menu/$(APP_NAME)		$(INSTALL_SHARE_DIR)/menu/$(APP_NAME)
--	@cp ./debian/menu/$(APP_NAME).desktop	$(INSTALL_SHARE_DIR)/applications/$(APP_NAME).desktop
-+	mkdir -p $(INSTALL_SHARE_DIR)/icons/hicolor/32x32/apps
-+	mkdir -p $(INSTALL_SHARE_DIR)/icons/hicolor/48x48/apps
-+	mkdir -p $(INSTALL_SHARE_DIR)/icons/hicolor/64x64/apps
-+	mkdir -p $(INSTALL_SHARE_DIR)/icons/hicolor/128x128/apps
-+	mkdir -p $(INSTALL_SHARE_DIR)/menu
-+	mkdir -p $(INSTALL_SHARE_DIR)/pixmaps
-+	mkdir -p $(INSTALL_SHARE_DIR)/applications
-+	cp ./debian/menu/icon32x32.png		$(INSTALL_SHARE_DIR)/icons/hicolor/32x32/apps/$(APP_NAME).png
-+	cp ./debian/menu/icon48x48.png		$(INSTALL_SHARE_DIR)/icons/hicolor/48x48/apps/$(APP_NAME).png
-+	cp ./debian/menu/icon64x64.png		$(INSTALL_SHARE_DIR)/icons/hicolor/64x64/apps/$(APP_NAME).png
-+	cp ./debian/menu/icon128x128.png	$(INSTALL_SHARE_DIR)/icons/hicolor/128x128/apps/$(APP_NAME).png
-+	cp ./debian/menu/icon.xpm		$(INSTALL_SHARE_DIR)/pixmaps/$(APP_NAME).xpm
-+	cp ./debian/menu/$(APP_NAME).desktop	$(INSTALL_SHARE_DIR)/applications/$(APP_NAME).desktop
- 
- uninstall:
- 	@rm -f $(INSTALL_BIN_DIR)/$(APP_NAME)
diff --git a/wxmp3gain.changes b/wxmp3gain.changes
index faba756..f445d50 100644
--- a/wxmp3gain.changes
+++ b/wxmp3gain.changes
@@ -1,3 +1,18 @@
+-------------------------------------------------------------------
+Mon Apr 22 13:11:06 UTC 2019 - Luigi Baldoni <aloisio@gmx.com>
+
+- Update to version 4.0
+  * Bug fix for unicode filenames
+  * Added Turkish translation
+  * Added Croatian translation
+  * Code refactor in make/build process
+
+- Switched build to cmake
+
+- Dropped wxmp3gain-makefile.patch
+
+- Added wxmp3gain-docs.patch
+
 -------------------------------------------------------------------
 Sun Feb 11 12:59:48 UTC 2018 - aloisio@gmx.com
 
diff --git a/wxmp3gain.spec b/wxmp3gain.spec
index d10e5ed..7bc2edd 100644
--- a/wxmp3gain.spec
+++ b/wxmp3gain.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package wxmp3gain
 #
-# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -12,20 +12,21 @@
 # license that conforms to the Open Source Definition (Version 1.9)
 # published by the Open Source Initiative.
 
-# Please submit bugfixes or comments via http://bugs.opensuse.org/
+# Please submit bugfixes or comments via https://bugs.opensuse.org/
 #
 
 
 Name:           wxmp3gain
-Version:        3.7
+Version:        4.0
 Release:        0
 Summary:        Front-end for mp3gain based on wxWidgets
-License:        GPL-3.0+
+License:        GPL-3.0-or-later
 Group:          Productivity/Multimedia/Sound/Editors and Convertors
 URL:            https://wxmp3gain.sourceforge.io
-Source0:        http://sourceforge.net/projects/wxmp3gain/files/%{version}/wxmp3gain_%{version}_src.tar.gz
-# PATCH-FIX-OPENSUSE wxmp3gain-makefile.patch aloisio@gmx.com -- sets suitable paths and flags
-Patch0:         wxmp3gain-makefile.patch
+Source0:        https://sourceforge.net/projects/wxmp3gain/files/%{version}/wxmp3gain-%{version}-src.tar.gz
+# PATCH-FEATURE-OPENSUSE wxmp3gain-docs.patch aloisio@gmx.com -- do not install docs
+Patch1:         wxmp3gain-docs.patch
+BuildRequires:  cmake
 BuildRequires:  dos2unix
 BuildRequires:  gcc-c++
 BuildRequires:  hicolor-icon-theme
@@ -41,15 +42,16 @@ A front-end for mp3gain based on the wxWidgets toolkit.
 %lang_package
 
 %prep
-%setup -q -n %{name}
-%patch0 -p1
-dos2unix docs/CHANGELOG
+%setup -q
+%patch1 -p1
+dos2unix docs/AUTHORS docs/CHANGELOG docs/README docs/TODO
 
 %build
+%cmake
 make %{?_smp_mflags}
 
 %install
-%make_install
+%cmake_install
 %suse_update_desktop_file %{name} AudioVideoEditing
 
 %files
@@ -58,7 +60,6 @@ make %{?_smp_mflags}
 %{_bindir}/%{name}
 %{_datadir}/applications/%{name}.desktop
 %{_datadir}/icons/hicolor/*/apps/%{name}.png
-%{_datadir}/pixmaps/%{name}.xpm
 %dir %{_datadir}/%{name}
 %dir %{_datadir}/%{name}/resource
 %{_datadir}/%{name}/resource/*.ico
@@ -69,12 +70,16 @@ make %{?_smp_mflags}
 %dir %{_datadir}/%{name}/resource/msg/cs
 %dir %{_datadir}/%{name}/resource/msg/de
 %dir %{_datadir}/%{name}/resource/msg/es
+%dir %{_datadir}/%{name}/resource/msg/hr_HR
 %dir %{_datadir}/%{name}/resource/msg/pt_BR
 %dir %{_datadir}/%{name}/resource/msg/ru
+%dir %{_datadir}/%{name}/resource/msg/tr
 %lang(cs) %{_datadir}/%{name}/resource/msg/cs/%{name}.mo
 %lang(de) %{_datadir}/%{name}/resource/msg/de/%{name}.mo
 %lang(es) %{_datadir}/%{name}/resource/msg/es/%{name}.mo
+%lang(hr) %{_datadir}/%{name}/resource/msg/hr_HR/%{name}.mo
 %lang(pt) %{_datadir}/%{name}/resource/msg/pt_BR/%{name}.mo
 %lang(ru) %{_datadir}/%{name}/resource/msg/ru/%{name}.mo
+%lang(tr) %{_datadir}/%{name}/resource/msg/tr/%{name}.mo
 
 %changelog
diff --git a/wxmp3gain_3.7_src.tar.gz b/wxmp3gain_3.7_src.tar.gz
deleted file mode 100644
index a8a93a6..0000000
--- a/wxmp3gain_3.7_src.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:6ab5aaa300c579edb5c3b2c0c3c419c40f5c05a56ff5eb8ece00341e13a54710
-size 157552