diff --git a/multi_user/__init__.py b/multi_user/__init__.py
index 0b76f90..339ed0f 100644
--- a/multi_user/__init__.py
+++ b/multi_user/__init__.py
@@ -44,7 +44,7 @@ from . import environment
 
 
 DEPENDENCIES = {
-    ("replication", '0.1.6'),
+    ("replication", '0.2.0'),
 }
 
 
diff --git a/multi_user/operators.py b/multi_user/operators.py
index 95f7905..920ff77 100644
--- a/multi_user/operators.py
+++ b/multi_user/operators.py
@@ -699,12 +699,10 @@ def sanitize_deps_graph(dummy):
     """
 
     if session and session.state['STATE'] == STATE_ACTIVE:
-        session.lock()
         for node_key in session.list():
             node = session.get(node_key)
             if node and not node.resolve(construct=False):
                 session.remove(node_key)
-        session.unlock()
 
 @persistent
 def load_pre_handler(dummy):