diff --git a/msal_extensions/token_cache.py b/msal_extensions/token_cache.py
index fce54b1..4d419d2 100644
--- a/msal_extensions/token_cache.py
+++ b/msal_extensions/token_cache.py
@@ -77,18 +77,6 @@ def _read(self):
         with open(self._cache_location, 'r') as handle:
             return handle.read()
 
-    def add(self, event, **kwargs):
-        with CrossPlatLock(self._lock_location):
-            if self._needs_refresh():
-                try:
-                    self.deserialize(self._read())
-                except IOError as exp:
-                    if exp.errno != errno.ENOENT:
-                        raise
-            super(FileTokenCache, self).add(event, **kwargs)  # pylint: disable=duplicate-code
-            self._write(self.serialize())
-            self._last_sync = os.path.getmtime(self._cache_location)
-
     def modify(self, credential_type, old_entry, new_key_value_pairs=None):
         with CrossPlatLock(self._lock_location):
             if self._needs_refresh():
diff --git a/setup.py b/setup.py
index ce287c8..8424dae 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@
         'Development Status :: 2 - Pre-Alpha',
     ],
     install_requires=[
-        'msal~=0.4',
+        'msal~=0.4.1',
         'portalocker~=1.0',
     ],
     tests_require=['pytest'],