Error on update

Hi gyus,. Trying to update hassbian but get this error:
(homeassistant) homeassistant@hassbian:/home/pi $ pip3 install --upgrade homeass istant
Collecting homeassistant
Using cached homeassistant-0.42.2-py2.py3-none-any.whl
Requirement already up-to-date: typing<4,>=3 in /srv/homeassistant/lib/python3.4 /site-packages (from homeassistant)
Requirement already up-to-date: async-timeout==1.2.0 in /srv/homeassistant/lib/p ython3.4/site-packages (from homeassistant)
Requirement already up-to-date: requests<3,>=2 in /srv/homeassistant/lib/python3 .4/site-packages (from homeassistant)
Requirement already up-to-date: pip>=7.1.0 in /srv/homeassistant/lib/python3.4/s ite-packages (from homeassistant)
Exception:
Traceback (most recent call last):
File “/srv/homeassistant/lib/python3.4/site-packages/pip/basecommand.py”, line 215, in main
status = self.run(options, args)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/commands/install.py”, line 324, in run
requirement_set.prepare_files(finder)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/req/req_set.py”, line 380, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File “/srv/homeassistant/lib/python3.4/site-packages/pip/req/req_set.py”, line 487, in preparefile
req_to_install, finder)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/req/req_set.py”, line 428, in checkskip_installed
req_to_install, upgrade_allowed)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/index.py”, line 465, in find_requirement
all_candidates = self.find_all_candidates(req.name)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/index.py”, line 423, in find_all_candidates
for page in self.getpages(url_locations, project_name):
File “/srv/homeassistant/lib/python3.4/site-packages/pip/index.py”, line 568, in getpages
page = self.getpage(location)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/index.py”, line 683, in getpage
return HTMLPage.get_page(link, session=self.session)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/index.py”, line 792, in get_page
“Cache-Control”: “max-age=600”,
File “/srv/homeassistant/lib/python3.4/site-packages/pip/_vendor/requests/sess ions.py”, line 488, in get
return self.request(‘GET’, url, **kwargs)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/download.py”, line 38 6, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/_vendor/requests/sess ions.py”, line 475, in request
resp = self.send(prep, **send_kwargs)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/_vendor/requests/sess ions.py”, line 596, in send
r = adapter.send(request, **kwargs)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/_vendor/cachecontrol/ adapter.py”, line 37, in send
cached_response = self.controller.cached_request(request)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/_vendor/cachecontrol/ controller.py”, line 111, in cached_request
resp = self.serializer.loads(request, cache_data)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/_vendor/cachecontrol/ serialize.py”, line 114, in loads
return getattr(self, “loadsv{0}”.format(ver))(request, data)
File “/srv/homeassistant/lib/python3.4/site-packages/pip/_vendor/cachecontrol/ serialize.py”, line 176, in loadsv2
cached = json.loads(zlib.decompress(data).decode(“utf8”))
zlib.error: Error -3 while decompressing data: invalid distance too far back
Anyone have an idea?