diff --git a/pyls/python_ls.py b/pyls/python_ls.py
index 22ad7b10..af4ba9b2 100644
--- a/pyls/python_ls.py
+++ b/pyls/python_ls.py
@@ -154,6 +154,9 @@ def m_initialize(self, processId=None, rootUri=None, rootPath=None, initializati
         # Get our capabilities
         return {'capabilities': self.capabilities()}
 
+    def m_initialized(self, **_kwargs):
+        pass
+
     def code_actions(self, doc_uri, range, context):
         return flatten(self._hook('pyls_code_actions', doc_uri, range=range, context=context))