diff --git a/v4-client-py/pyproject.toml b/v4-client-py/pyproject.toml
index 073785d7..b123188e 100644
--- a/v4-client-py/pyproject.toml
+++ b/v4-client-py/pyproject.toml
@@ -5,7 +5,7 @@ package-dir = {"" = "v4_client_py"}
 
 [tool.poetry]
 name = "v4-client-py"
-version = "0.6.5"
+version = "0.6.6"
 description = "dYdX v4 Client"
 authors = ["John Huang <contact@dydx.exchange>"]
 license = "BSL-1.1"
diff --git a/v4-client-py/v4_client_py/clients/composer.py b/v4-client-py/v4_client_py/clients/composer.py
index 7f3d86ae..38ddf6d4 100644
--- a/v4-client-py/v4_client_py/clients/composer.py
+++ b/v4-client-py/v4_client_py/clients/composer.py
@@ -155,8 +155,7 @@ def compose_msg_cancel_order(
         )
         return MsgCancelOrder(
             order_id=order_id, 
-            good_til_block=good_til_block,
-            good_til_block_time=good_til_block_time
+            good_til_block=good_til_block
         )
     
     def compose_msg_transfer(