diff --git a/cockpit.spec b/cockpit.spec
index 54f0717..8690adb 100644
--- a/cockpit.spec
+++ b/cockpit.spec
@@ -60,7 +60,7 @@ URL:            https://cockpit-project.org/
 
 Version:        236
 Release:        0
-Source0:        cockpit-%{version}.tar.gz
+Source0:        cockpit-%{version}.tar.xz
 Source1:        cockpit.pam
 Source2:        cockpit-rpmlintrc
 Source99:       README.packaging