diff --git a/simpleflow/swf/mapper/core.py b/simpleflow/swf/mapper/core.py
index 594c0d91..849b64b5 100644
--- a/simpleflow/swf/mapper/core.py
+++ b/simpleflow/swf/mapper/core.py
@@ -83,7 +83,7 @@ def list_open_workflow_executions(
             }
         if tag:
             kwargs["tagFilter"] = {
-                "name": tag,
+                "tag": tag,
             }
         if workflow_id:
             kwargs["executionFilter"] = {
@@ -138,7 +138,7 @@ def list_closed_workflow_executions(
             }
         if tag:
             kwargs["tagFilter"] = {
-                "name": tag,
+                "tag": tag,
             }
         if workflow_id:
             kwargs["executionFilter"] = {