diff --git a/src/backend/base/langflow/schema/artifact.py b/src/backend/base/langflow/schema/artifact.py
index c1a0d287c..0e6d890e8 100644
--- a/src/backend/base/langflow/schema/artifact.py
+++ b/src/backend/base/langflow/schema/artifact.py
@@ -46,5 +46,7 @@ def get_artifact_type(value, build_result=None) -> str:
 def post_process_raw(raw, artifact_type: str):
     if artifact_type == ArtifactType.STREAM.value:
         raw = ""
+    elif artifact_type == ArtifactType.UNKNOWN.value:
+        raw = str(raw)
 
     return raw