diff --git a/README.md b/README.md
index 7694088..aa89e6f 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 ## Release
 
+v0.5.1     (2015-01-23)
+
+    --  Hotfix: error while handling a DIDL item (in SoCo framework)
+
 v0.5       (2015-01-18)
 
     --  interactive command shell added to interact with the speakers directly (see docu)
diff --git a/server.sonos/CHANGES.txt b/server.sonos/CHANGES.txt
index 7ec3652..c13d6a6 100644
--- a/server.sonos/CHANGES.txt
+++ b/server.sonos/CHANGES.txt
@@ -1,3 +1,7 @@
+v0.5.1     (2015-01-23)
+
+    --  Hotfix: error while handling a DIDL item (in SoCo framework)
+
 v0.5       (2015-01-19)
 
     --  commands added: get_playlist, set_playlist (see documentation). Its now possible to
diff --git a/server.sonos/MANIFEST b/server.sonos/MANIFEST
index 1c1cac1..baacd8f 100644
--- a/server.sonos/MANIFEST
+++ b/server.sonos/MANIFEST
@@ -20,6 +20,7 @@ soco/compat.py
 soco/config.py
 soco/core.py
 soco/data_structures.py
+soco/discovery.py
 soco/events.py
 soco/exceptions.py
 soco/groups.py
diff --git a/server.sonos/lib_sonos/definitions.py b/server.sonos/lib_sonos/definitions.py
index b486236..e1f02fc 100644
--- a/server.sonos/lib_sonos/definitions.py
+++ b/server.sonos/lib_sonos/definitions.py
@@ -23,7 +23,7 @@
 # regular expressions to find sonos meta info through udp stream
 ip_pattern = '^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$'
 
-VERSION = "0.5 (2015-01-18)"
+VERSION = "0.5.1 (2015-01-23)"
 
 DEFAULT_HOST = '0.0.0.0'
 DEFAULT_PORT = 12900