diff --git a/mod_archive/src/mod_archive.erl b/mod_archive/src/mod_archive.erl
index f4c8dcf..d71c760 100644
--- a/mod_archive/src/mod_archive.erl
+++ b/mod_archive/src/mod_archive.erl
@@ -37,14 +37,10 @@
 -record(state, {host, storages, save_default, session_duration}).
 
 -define(PROCNAME, ejabberd_mod_archive).
--define(NS_ARCHIVE,
-	"http://www.xmpp.org/extensions/xep-0136.html#ns").
--define(NS_ARCHIVE_MANAGE,
-	"http://www.xmpp.org/extensions/xep-0136.html#ns-manage").
--define(NS_ARCHIVE_PREF,
-	"http://www.xmpp.org/extensions/xep-0136.html#ns-pref").
--define(NS_ARCHIVE_MANUAL,
-	"http://www.xmpp.org/extensions/xep-0136.html#ns-manual").
+-define(NS_ARCHIVE, "urn:xmpp:archive").
+-define(NS_ARCHIVE_MANAGE, "urn:xmpp:archive:manage").
+-define(NS_ARCHIVE_PREF, "urn:xmpp:archive:pref").
+-define(NS_ARCHIVE_MANUAL, "urn:xmpp:archive:manual").
 -define(INFINITY, calendar:datetime_to_gregorian_seconds({{2038,1,19},{0,0,0}})).
 
 -define(MYDEBUG(Format, Args),
diff --git a/mod_archive/src/mod_archive_odbc.erl b/mod_archive/src/mod_archive_odbc.erl
index d25ab19..6bab5f3 100644
--- a/mod_archive/src/mod_archive_odbc.erl
+++ b/mod_archive/src/mod_archive_odbc.erl
@@ -90,16 +90,11 @@
                 session_duration}).
 
 -define(PROCNAME, ejabberd_mod_archive_odbc).
--define(NS_ARCHIVE,
-        "http://www.xmpp.org/extensions/xep-0136.html#ns").
--define(NS_ARCHIVE_AUTO,
-        "http://www.xmpp.org/extensions/xep-0136.html#ns-auto").
--define(NS_ARCHIVE_MANAGE,
-        "http://www.xmpp.org/extensions/xep-0136.html#ns-manage").
--define(NS_ARCHIVE_PREF,
-        "http://www.xmpp.org/extensions/xep-0136.html#ns-pref").
--define(NS_ARCHIVE_MANUAL,
-        "http://www.xmpp.org/extensions/xep-0136.html#ns-manual").
+-define(NS_ARCHIVE, "urn:xmpp:archive").
+-define(NS_ARCHIVE_AUTO, "urn:xmpp:archive:auto").
+-define(NS_ARCHIVE_MANAGE, "urn:xmpp:archive:manage").
+-define(NS_ARCHIVE_PREF, "urn:xmpp:archive:pref").
+-define(NS_ARCHIVE_MANUAL, "urn:xmpp:archive:manual").
 -define(INFINITY, calendar:datetime_to_gregorian_seconds({{2038,1,19},{0,0,0}})).
 
 %% Should be OK for most of modern DBs, I hope ...
diff --git a/mod_archive/src/mod_archive_sql.erl b/mod_archive/src/mod_archive_sql.erl
index 27f8150..52a9564 100644
--- a/mod_archive/src/mod_archive_sql.erl
+++ b/mod_archive/src/mod_archive_sql.erl
@@ -38,14 +38,10 @@
 		session_duration}).
 
 -define(PROCNAME, ejabberd_mod_archive_sql).
--define(NS_ARCHIVE,
-	"http://www.xmpp.org/extensions/xep-0136.html#ns").
--define(NS_ARCHIVE_MANAGE,
-	"http://www.xmpp.org/extensions/xep-0136.html#ns-manage").
--define(NS_ARCHIVE_PREF,
-	"http://www.xmpp.org/extensions/xep-0136.html#ns-pref").
--define(NS_ARCHIVE_MANUAL,
-	"http://www.xmpp.org/extensions/xep-0136.html#ns-manual").
+-define(NS_ARCHIVE, "urn:xmpp:archive").
+-define(NS_ARCHIVE_MANAGE, "urn:xmpp:archive:manage").
+-define(NS_ARCHIVE_PREF, "urn:xmpp:archive:pref").
+-define(NS_ARCHIVE_MANUAL, "urn:xmpp:archive:manual").
 -define(INFINITY, calendar:datetime_to_gregorian_seconds({{2038,1,19},{0,0,0}})).
 -define(DICT, dict).