diff --git a/synapseclient/client.py b/synapseclient/client.py
index 508bd2594..814671415 100644
--- a/synapseclient/client.py
+++ b/synapseclient/client.py
@@ -93,6 +93,7 @@
     id_of,
     get_properties,
     MB,
+    memoize,
     is_json,
     extract_synapse_id_from_query,
     find_data_file_handle,
@@ -497,7 +498,7 @@ def login(
             cached_sessions.set_most_recent_user(self.credentials.username)
 
         if not silent:
-            profile = self.getUserProfile()
+            profile = self.getUserProfile(refresh=True)
             # TODO-PY3: in Python2, do we need to ensure that this is encoded in utf-8
             self.logger.info(
                 "Welcome, %s!\n"
@@ -611,23 +612,26 @@ def invalidateAPIKey(self):
         if self._is_logged_in():
             self.restDELETE("/secretKey", endpoint=self.authEndpoint)
 
-    @functools.lru_cache()
+    @memoize
     def getUserProfile(
         self,
         id: Union[str, int, UserProfile, TeamMember] = None,
         sessionToken: str = None,
+        refresh: bool = False,
     ) -> UserProfile:
         """
         Get the details about a Synapse user.
         Retrieves information on the current user if 'id' is omitted.
         :param id:           The 'userId' (aka 'ownerId') of a user or the userName
         :param sessionToken: The session token to use to find the user profile
+        :param refresh:      If set to True will always fetch the data from Synape otherwise will use cached information
         :returns: The user profile for the user of interest.
 
         Example::
             my_profile = syn.getUserProfile()
             freds_profile = syn.getUserProfile('fredcommo')
         """
+
         try:
             # if id is unset or a userID, this will succeed
             id = "" if id is None else int(id)
@@ -648,6 +652,7 @@ def getUserProfile(
                     else:  # no break
                         raise ValueError('Can\'t find user "%s": ' % id)
         uri = "/userProfile/%s" % id
+
         return UserProfile(
             **self.restGET(
                 uri, headers={"sessionToken": sessionToken} if sessionToken else None
@@ -2644,7 +2649,7 @@ def _download_from_URL(
                     else:
                         mode = "wb"
                         previouslyTransferred = 0
-                        sig = hashlib.new("md5", usedforsecurity=False)
+                        sig = hashlib.md5()
 
                     try:
                         with open(temp_destination, mode) as fd:
@@ -4766,6 +4771,7 @@ def _generate_headers(self, headers=None):
 
         if headers is None:
             headers = dict(self.default_headers)
+
         headers.update(synapseclient.USER_AGENT)
 
         return headers
@@ -4801,7 +4807,6 @@ def _rest_call(
         uri, headers = self._build_uri_and_headers(
             uri, endpoint=endpoint, headers=headers
         )
-
         retryPolicy = self._build_retry_policy(retryPolicy)
         requests_session = requests_session or self._requests_session
 
@@ -4818,7 +4823,6 @@ def _rest_call(
             verbose=self.debug,
             **retryPolicy,
         )
-
         self._handle_synapse_http_error(response)
         return response
 
diff --git a/synapseclient/core/utils.py b/synapseclient/core/utils.py
index 6b0fbd7b5..d2da9dd5d 100644
--- a/synapseclient/core/utils.py
+++ b/synapseclient/core/utils.py
@@ -6,6 +6,7 @@
 import collections.abc
 import datetime
 import errno
+import functools
 import hashlib
 import importlib
 import inspect
@@ -45,7 +46,7 @@ def md5_for_file(filename, block_size=2 * MB, callback=None):
     :returns: The MD5
     """
 
-    md5 = hashlib.new("md5", usedforsecurity=False)
+    md5 = hashlib.md5()
     with open(filename, "rb") as f:
         while True:
             if callback:
@@ -638,6 +639,21 @@ def extract_synapse_id_from_query(query):
         raise ValueError('Couldn\'t extract synapse ID from query: "%s"' % query)
 
 
+# Derived from https://wiki.python.org/moin/PythonDecoratorLibrary#Memoize
+def memoize(obj):
+    cache = obj._memoize_cache = {}
+
+    @functools.wraps(obj)
+    def memoizer(*args, **kwargs):
+        refresh = kwargs.pop("refresh", False)
+        key = str(args) + str(kwargs)
+        if refresh or key not in cache:
+            cache[key] = obj(*args, **kwargs)
+        return cache[key]
+
+    return memoizer
+
+
 def printTransferProgress(
     transferred,
     toBeTransferred,
diff --git a/tests/unit/synapseclient/core/unit_test_utils.py b/tests/unit/synapseclient/core/unit_test_utils.py
index aa7fdc2dc..09187169f 100644
--- a/tests/unit/synapseclient/core/unit_test_utils.py
+++ b/tests/unit/synapseclient/core/unit_test_utils.py
@@ -483,7 +483,7 @@ def test_md5_for_file(mock_hashlib):
     file_name = "/home/foo/bar/test.txt"
     mock_callback = Mock()
     mock_md5 = Mock()
-    mock_hashlib.new.return_value = mock_md5
+    mock_hashlib.md5.return_value = mock_md5
     with patch.object(utils, "open", mock_open(), create=True) as mocked_open:
         mocked_open.return_value.read.side_effect = ["data1", "data2", None]
         utils.md5_for_file(file_name, callback=mock_callback)
diff --git a/tests/unit/synapseclient/unit_test_client.py b/tests/unit/synapseclient/unit_test_client.py
index deb9f0cf4..42547d642 100644
--- a/tests/unit/synapseclient/unit_test_client.py
+++ b/tests/unit/synapseclient/unit_test_client.py
@@ -141,6 +141,7 @@ def test_login__silentIsFalse(self):
             # method under test
             self.syn.login(silent=False, **self.login_args)
 
+            mocked_get_user_profile.assert_called_once_with(refresh=True)
             mocked_logger.info.assert_called_once()
 
     def test_login__rememberMeIsTrue(self, mocker):