diff --git a/pisi-spec.rng b/pisi-spec.rng
index 11d36145..72738111 100644
--- a/pisi-spec.rng
+++ b/pisi-spec.rng
@@ -283,12 +283,12 @@
                 <value>GDLS</value>
                 <value>GLX</value>
                 <value>GMGPL</value>
-                <value>GPL-1</value>
-                <value>GPL-2</value>
-                <value>GPL-2-with-MySQL-FLOSS-exception</value>
-                <value>GPL-2-with-exceptions</value>
-                <value>GPL-2-with-linking-exception</value>
-                <value>GPL-3</value>
+                <value>GPLv1</value>
+                <value>GPLv2</value>
+                <value>GPLv2-with-MySQL-FLOSS-exception</value>
+                <value>GPLv2-with-exceptions</value>
+                <value>GPLv2-with-linking-exception</value>
+                <value>GPLv3</value>
                 <value>HBRL</value>
                 <value>HKSCS</value>
                 <value>HPL</value>