diff --git a/README.md b/README.md
index 60c30edbe1559be622beb2315f03dcd6f1f79e58..beb816a74478926f66b3565b11a170ab5ae6305f 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Qt Client for [Ucoin](http://www.ucoin.io) project.
   * The executable is generated in "build" folder, named "cutecoin"
 
 ### How to download latest release
-  * Go to the [current release](https://github.com/ucoin-io/cutecoin/releases/tag/0.8.2)
+  * Go to the [current release](https://github.com/ucoin-io/cutecoin/releases/tag/0.9.0)
   * Download the package corresponding to your operating system
   * Unzip and start "cutecoin" :)
   * Join our beta community by contacting us on ucoin forums : forum.ucoin.io
diff --git a/src/cutecoin/core/community.py b/src/cutecoin/core/community.py
index 171fc81389386cfce46577012a0a0bc6758c1437..93451ef8f159969a1d0b6635d16dbc4908748635 100644
--- a/src/cutecoin/core/community.py
+++ b/src/cutecoin/core/community.py
@@ -17,8 +17,7 @@ from requests.exceptions import RequestException
 
 
 class Cache():
-    _saved_requests = [hash(bma.blockchain.Block),
-                       hash(bma.wot.Lookup)]
+    _saved_requests = [str(bma.blockchain.Block)]
 
     def __init__(self, community):
         '''
@@ -48,6 +47,8 @@ class Cache():
 
         :return: The cache as a dict in json format
         '''
+        #TODO: Change the requests caching because hashed keys are different
+        #from a cutecoin run to another
         data = {k: self.data[k] for k in self.data.keys()
                    if k[0] in Cache._saved_requests}
         entries = []
@@ -75,11 +76,11 @@ class Cache():
         :param req_args: The arguments passed to the request constructor
         :param get_args: The arguments passed to the requests __get__ method
         '''
-        cache_key = (hash(request),
-                     hash(tuple(frozenset(sorted(req_args.keys())))),
-                     hash(tuple(frozenset(sorted(req_args.items())))),
-                     hash(tuple(frozenset(sorted(get_args.keys())))),
-                     hash(tuple(frozenset(sorted(get_args.items())))))
+        cache_key = (str(request),
+                     str(tuple(frozenset(sorted(req_args.keys())))),
+                     str(tuple(frozenset(sorted(req_args.items())))),
+                     str(tuple(frozenset(sorted(get_args.keys())))),
+                     str(tuple(frozenset(sorted(get_args.items())))))
 
         if cache_key not in self.data.keys():
             result = self.community.request(request, req_args, get_args,
diff --git a/src/cutecoin/core/net/network.py b/src/cutecoin/core/net/network.py
index bab907d6ff7544dd4026eb3802010b65f585a281..26b1948d5defe43b781816ff08a365707d3e17b3 100644
--- a/src/cutecoin/core/net/network.py
+++ b/src/cutecoin/core/net/network.py
@@ -3,10 +3,6 @@ Created on 24 févr. 2015
 
 @author: inso
 '''
-
-from ucoinpy.documents.peer import Peer, BMAEndpoint
-from ucoinpy.api import bma
-
 from .node import Node
 
 import logging
@@ -166,6 +162,7 @@ class Network(QObject):
             node.check_sync(block_max)
 
         #TODO: Offline nodes for too long have to be removed
+
         #TODO: Corrupted nodes should maybe be removed faster ?
 
         logging.debug("Nodes found : {0}".format(nodes))