diff --git a/main/xz/APKBUILD b/main/xz/APKBUILD
index 136697ba11b01048f8308d1b97608289a9f0b62e..024efcebcd48088521b00a2f1b29dc3a79e50094 100644
--- a/main/xz/APKBUILD
+++ b/main/xz/APKBUILD
@@ -1,8 +1,8 @@
 # Contributor: Sören Tempel <soeren+alpine@soeren-tempel.net>
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=xz
-pkgver=5.4.2
-pkgrel=1
+pkgver=5.4.3
+pkgrel=0
 pkgdesc="Library and CLI tools for XZ and LZMA compressed files"
 url="https://tukaani.org/xz"
 arch="all"
@@ -17,7 +17,7 @@ source="https://tukaani.org/xz/xz-$pkgver.tar.xz"
 
 build() {
 	# compression utility
-	CFLAGS="$CFLAGS -O2" \
+	CFLAGS="$CFLAGS -O3" \
 	./configure \
 		--build=$CBUILD \
 		--host=$CHOST \
@@ -49,5 +49,5 @@ package() {
 }
 
 sha512sums="
-39163ee327743111968c4231fccc4ebbc1c77c96acf19afa8b1ca4153826a2c0d83b43111fa22b56139c03fc19c621d365fa0f80be1f3c3784fe7dd6f8fcfb68  xz-5.4.2.tar.xz
+7252191339afb97fc6a00616b1a8b9f24247d3539e7dbffca2045954593ae3e20d59e34f24c03b1954c96fbfa9cc8a7fea2a6e501e837872f90e8cd8bb307bb5  xz-5.4.3.tar.xz
 "