diff --git a/src/backend/langflow/interface/custom/utils.py b/src/backend/langflow/interface/custom/utils.py
new file mode 100644
index 000000000..99b0d4bc6
--- /dev/null
+++ b/src/backend/langflow/interface/custom/utils.py
@@ -0,0 +1,10 @@
+import re
+
+
+def extract_inner_type(return_type: str) -> str:
+    """
+    Extracts the inner type from a type hint that is a list.
+    """
+    if match := re.match(r"list\[(.*)\]", return_type, re.IGNORECASE):
+        return match[1]
+    return return_type