diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
new file mode 100644
index 0000000..5eb1b8c
--- /dev/null
+++ b/.gitea/workflows/release.yml
@@ -0,0 +1,41 @@
+name: MLC Release workflow
+run-name: ${{ gitea.actor }} is running MLC Release workflow on release ${{ gitea.event.release.tag_name }}
+on:
+  release:
+    types: [published]
+
+jobs:
+  Archlinux:
+    runs-on: archlinux
+    steps:
+      - name: Download the release tarball
+        uses: curl -sL "${{ gitea.server_url }}/${{ gitea.repository }}/archive/${{ gitea.event.release.tag_name }}.tar.gz"
+
+      - name: Set tarball filename variable
+        run: echo "tbName=$(echo ${{ gitea.event.repository.name }}-${{ gitea.event.release.tag_name }}.tar.gz)" >> $GITHUB_ENV
+
+      - name: Calculate SHA256 for the tarball
+        run: echo "tbSum=$(echo sha256sum ${{ env.tbName }} | cut -d " " -f 1" >> $GITHUB_ENV
+
+      - name: Unarchive tarball
+        run: tar -xvzf ${{ env.tbName }}
+
+      - name: Create a directory
+        run: mkdir aur
+
+      - name: Copy PKGBUILD to the directory
+        run: cp mlc/packaging/Archlinux/PKGBUILD aur/
+
+      - name: Put SHA256 sum to PKGBUILD file
+        working-directory: aur
+        run: sed -i "/sha256sums=/c\sha256sums=('${{ env.tbSum }}')" PKGBUILD
+
+      - name: create SRCINFO
+        working-directory: aur
+        run: makepkg --printsrcinfo > .SRCINFO
+
+      - name: Debug print PKGBUILD
+        run: cat aur/PKGBUILD
+
+      - name: Debug print .SRCINFO
+        run: cat aur/.SRCINFO
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2f4c444..73323f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## MLC 1.3.1 (October 10, 2023)
+- Release build with optimisations
+- Removed unused files from build
+- Suppressed warnings
+- CI to release to AUR
+
 ## MLC 1.3.0 (October 09, 2023)
 - Config file to control the process
 - First help page
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3114df2..6c02ded 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,13 +1,27 @@
 cmake_minimum_required(VERSION 3.5)
 project(
     mlc
-    VERSION 1.3.0
+    VERSION 1.3.1
     DESCRIPTION "Media Library Compiler: rips your media library to a lossy compilation"
     LANGUAGES CXX
 )
 cmake_policy(SET CMP0076 NEW)
 cmake_policy(SET CMP0079 NEW)
 
+if (NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Debug)
+endif ()
+
+if (CMAKE_BUILD_TYPE STREQUAL "Release")
+  list(APPEND COMPILE_OPTIONS -O3)
+elseif (CMAKE_BUILD_TYPE STREQUAL "Debug")
+  list(APPEND COMPILE_OPTIONS -g)
+  list(APPEND COMPILE_OPTIONS -Wall)
+  list(APPEND COMPILE_OPTIONS -Wextra)
+endif()
+
+message("Compilation options: " ${COMPILE_OPTIONS})
+
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
@@ -20,6 +34,7 @@ pkg_check_modules(LAME REQUIRED IMPORTED_TARGET lame)
 pkg_check_modules(TAGLIB REQUIRED IMPORTED_TARGET taglib)
 
 add_executable(mlc)
+target_compile_options(${PROJECT_NAME} PRIVATE ${COMPILE_OPTIONS})
 
 add_subdirectory(src)
 
diff --git a/mlc.kdev4 b/mlc.kdev4
deleted file mode 100644
index 4680c1f..0000000
--- a/mlc.kdev4
+++ /dev/null
@@ -1,3 +0,0 @@
-[Project]
-Name=mlc
-Manager=KDevCMakeManager
diff --git a/packaging/Archlinux/PKGBUILD b/packaging/Archlinux/PKGBUILD
new file mode 100644
index 0000000..d65afb0
--- /dev/null
+++ b/packaging/Archlinux/PKGBUILD
@@ -0,0 +1,24 @@
+# Maintainer: Yury Gubich <blue@macaw.me>
+pkgname=mlc
+pkgver=1.3.1
+pkgrel=1
+pkgdesc="Media Library Compiler: rips your media library to a lossy compilation"
+arch=('i686' 'x86_64')
+url="https://git.macaw.me/blue/mlc"
+license=('GPL3')
+depends=('flac' 'lame' 'libjpeg' 'taglib')
+makedepends=('cmake>=3.5' 'gcc>=7.0')
+optdepends=()
+
+source=("$pkgname-$pkgver.tar.gz::https://git.macaw.me/blue/$pkgname/archive/$pkgver.tar.gz")
+sha256sums=('SKIP')
+build() {
+        cd "$srcdir/$pkgname"
+        cmake . -D CMAKE_INSTALL_PREFIX=/usr -D CMAKE_BUILD_TYPE=Release
+        cmake --build .
+}
+package() {
+        cd "$srcdir/$pkgname"
+        DESTDIR="$pkgdir/" cmake --install .
+}
+
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 07770c0..1b1bfdd 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -8,7 +8,7 @@ endfunction(make_includable)
 set(SOURCES
     main.cpp
     help.cpp
-    decoded.cpp
+    #decoded.cpp
     flactomp3.cpp
     collection.cpp
     taskmanager.cpp
@@ -17,7 +17,7 @@ set(SOURCES
 
 set(HEADERS
     help.h
-    decoded.h
+    #decoded.h
     flactomp3.h
     collection.h
     taskmanager.h
diff --git a/src/settings.cpp b/src/settings.cpp
index 019eff5..53eaa0a 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -48,7 +48,7 @@ bool is_space(char ch){
 }
 
 Flag getFlag(const std::string_view arg) {
-    for (int i = 0; i < flags.size(); ++i) {
+    for (unsigned char i = 0; i < flags.size(); ++i) {
         const Literals& lit = flags[i];
         unsigned char dist = std::distance(lit.begin(), std::find(lit.begin(), lit.end(), arg));
         if (dist < lit.size())
@@ -82,7 +82,7 @@ Settings::Settings(int argc, char ** argv):
 
 void Settings::parseArguments() {
     Flag flag = Flag::none;
-    for (int i = 0; i < arguments.size(); ++i) {
+    for (unsigned int i = 0; i < arguments.size(); ++i) {
         const std::string_view& arg = arguments[i];
         if (i == 0) {
             Action act = stringToAction(arg);