diff --git a/docs/source/changelog.rst b/docs/source/changelog.rst
index 0bd3096..efbcdb4 100644
--- a/docs/source/changelog.rst
+++ b/docs/source/changelog.rst
@@ -1,6 +1,14 @@
 Changelog
 ---------
 
+PyHamTools 0.5.1
+================
+
+14. April 2015
+
+ * improved handling of expired QRZ.com sessions
+
+
 PyHamTools 0.5.0
 ================
 
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 00a7622..aa2ea5b 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -52,7 +52,7 @@ master_doc = 'index'
 
 # General information about the project.
 project = u'pyhamtools'
-copyright = u'2014, Tobias Wellnitz, DH1TW'
+copyright = u'2015, Tobias Wellnitz, DH1TW'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
diff --git a/pyhamtools/lookuplib.py b/pyhamtools/lookuplib.py
index 977a775..f471627 100644
--- a/pyhamtools/lookuplib.py
+++ b/pyhamtools/lookuplib.py
@@ -788,16 +788,23 @@ class LookupLib(object):
         root = BeautifulSoup(response.text)
         lookup = {}
 
-        if root.error: #try to get a new session key and try to request again
+        if root.error: 
         
             if re.search('Not found', root.error.text, re.I):  #No data available for callsign
                 raise KeyError(root.error.text)
-            elif re.search('Session Timeout', root.error.text, re.I): # Get new session key
+
+            #try to get a new session key and try to request again
+            elif re.search('Session Timeout', root.error.text, re.I) or re.search('Invalid session key', root.error.text, re.I):
                 self._apikey = apikey = self._get_qrz_session_key(self._username, self._pwd)
-                response = self._request_callsign_info_from_qrz(callsign, apikey)
+                response = self._request_callsign_info_from_qrz(callsign, apikey, apiv)
                 root = BeautifulSoup(response.text)
+                
+                #if this fails again, raise error
+                if root.error:
+                    raise AttributeError(root.error.text) #most likely session key invalid
+                
             else:
-                raise AttributeError(root.error.text) #most likely session key missing or invalid
+                raise AttributeError(root.error.text) #most likely session key missing
 
         if root.callsign is None:
             raise ValueError
diff --git a/pyhamtools/version.py b/pyhamtools/version.py
index 3431970..d035ac8 100644
--- a/pyhamtools/version.py
+++ b/pyhamtools/version.py
@@ -1,4 +1,4 @@
 #VERSION = (0, 5, 0, 'dev')
-VERSION = (0, 5, 0)
+VERSION = (0, 5, 1)
 __release__ = ''.join(['-.'[type(x) == int]+str(x) for x in VERSION])[1:]
 __version__ = '.'.join((str(VERSION[0]), str(VERSION[1])))