diff --git a/GraphicsMagick.spec b/GraphicsMagick.spec
index d16276a..d7b20b7 100644
--- a/GraphicsMagick.spec
+++ b/GraphicsMagick.spec
@@ -10,7 +10,7 @@ Version: 1.3.14
 Release: 1%{?dist}
 License: MIT
 Group: Applications/Multimedia
-Source0: http://downloads.sourceforge.net/sourceforge/graphicsmagick/GraphicsMagick-%{version}.tar.gz
+Source0: http://downloads.sourceforge.net/sourceforge/graphicsmagick/GraphicsMagick-%{version}.tar.xz
 Url: http://www.graphicsmagick.org/
 BuildRoot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)