diff --git a/src/backend/langflow/helpers/flow.py b/src/backend/langflow/helpers/flow.py
index 2127d043c..328e99ca1 100644
--- a/src/backend/langflow/helpers/flow.py
+++ b/src/backend/langflow/helpers/flow.py
@@ -12,9 +12,9 @@ if TYPE_CHECKING:
     from langflow.graph.vertex.base import Vertex
 
 INPUT_TYPE_MAP = {
-    "ChatInput": {"type_hint": "Optional[str]", "default": ""},
-    "TextInput": {"type_hint": "Optional[str]", "default": ""},
-    "JSONInput": {"type_hint": "Optional[dict]", "default": {}},
+    "ChatInput": {"type_hint": "Optional[str]", "default": '""'},
+    "TextInput": {"type_hint": "Optional[str]", "default": '""'},
+    "JSONInput": {"type_hint": "Optional[dict]", "default": "{}"},
 }