diff --git a/src/runner/Synapse.Runner/WorkflowOutputFormat.cs b/src/runner/Synapse.Runner/WorkflowOutputFormat.cs
index b8709054..27023066 100644
--- a/src/runner/Synapse.Runner/WorkflowOutputFormat.cs
+++ b/src/runner/Synapse.Runner/WorkflowOutputFormat.cs
@@ -28,6 +28,6 @@ public enum WorkflowOutputFormat
     /// <summary>
     /// Indicates that the workflow output should be formatted to YAML
     /// </summary>
-    [EnumMember(Value = "json")]
+    [EnumMember(Value = "yaml")]
     Yaml
 }
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