diff --git a/src/backend/langflow/interface/custom/constants.py b/src/backend/langflow/interface/custom/constants.py
index 0e747d0ca..83cf4b463 100644
--- a/src/backend/langflow/interface/custom/constants.py
+++ b/src/backend/langflow/interface/custom/constants.py
@@ -7,6 +7,7 @@ from langchain.schema import BaseRetriever, Document
 from langchain.text_splitter import TextSplitter
 from langchain.tools import Tool
 from langchain.vectorstores.base import VectorStore
+from langchain.schema import BaseOutputParser
 
 
 LANGCHAIN_BASE_TYPES = {
@@ -20,6 +21,7 @@ LANGCHAIN_BASE_TYPES = {
     "VectorStore": VectorStore,
     "Embeddings": Embeddings,
     "BaseRetriever": BaseRetriever,
+    "BaseOutputParser": BaseOutputParser,
 }
 
 # Langchain base types plus Python base types