Index: Makefile
==================================================================
--- Makefile
+++ Makefile
@@ -14,14 +14,15 @@
 utils ${TESTS}: src
 
 tarball:
 	echo "Generating tarball for version ${PACKAGE_VERSION}..."
 	rm -fr objfw-${PACKAGE_VERSION} objfw-${PACKAGE_VERSION}.tar \
-		objfw-${PACKAGE_VERSION}.tar.gz
+		objfw-${PACKAGE_VERSION}.tar.xz
 	mkdir objfw-${PACKAGE_VERSION}
 	git --work-tree=objfw-${PACKAGE_VERSION} checkout .
 	rm objfw-${PACKAGE_VERSION}/.gitignore
 	cp configure config.h.in objfw-${PACKAGE_VERSION}/
 	tar cf objfw-${PACKAGE_VERSION}.tar objfw-${PACKAGE_VERSION}
 	rm -fr objfw-${PACKAGE_VERSION}
-	gzip -9 objfw-${PACKAGE_VERSION}.tar
+	xz -9 objfw-${PACKAGE_VERSION}.tar
 	rm -f objfw-${PACKAGE_VERSION}.tar
+	gpg -b objfw-${PACKAGE_VERSION}.tar.xz || true