diff --git a/src/backend/langflow/graph/vertex/types.py b/src/backend/langflow/graph/vertex/types.py
index de2677d41..4aa93847a 100644
--- a/src/backend/langflow/graph/vertex/types.py
+++ b/src/backend/langflow/graph/vertex/types.py
@@ -123,9 +123,11 @@ class DocumentLoaderVertex(Vertex):
         # show how many documents are in the list?
 
         if not isinstance(self._built_object, UnbuiltObject):
-            avg_length = sum(len(record.text) for record in self._built_object if hasattr(record, "text")) / len(
-                self._built_object
-            )
+            avg_length = sum(
+                len(record.text)
+                for record in self._built_object
+                if hasattr(record, "text")
+            ) / len(self._built_object)
             return f"""{self.display_name}({len(self._built_object)} records)
             \nAvg. Record Length (characters): {int(avg_length)}
             Records: {self._built_object[:3]}..."""
@@ -198,7 +200,9 @@ class TextSplitterVertex(Vertex):
         # show how many documents are in the list?
 
         if not isinstance(self._built_object, UnbuiltObject):
-            avg_length = sum(len(doc.page_content) for doc in self._built_object) / len(self._built_object)
+            avg_length = sum(len(doc.page_content) for doc in self._built_object) / len(
+                self._built_object
+            )
             return f"""{self.vertex_type}({len(self._built_object)} documents)
             \nAvg. Document Length (characters): {int(avg_length)}
             \nDocuments: {self._built_object[:3]}..."""
@@ -245,18 +249,27 @@ class PromptVertex(Vertex):
         user_id = kwargs.get("user_id", None)
         tools = kwargs.get("tools", [])
         if not self._built or force:
-            if "input_variables" not in self.params or self.params["input_variables"] is None:
+            if (
+                "input_variables" not in self.params
+                or self.params["input_variables"] is None
+            ):
                 self.params["input_variables"] = []
             # Check if it is a ZeroShotPrompt and needs a tool
             if "ShotPrompt" in self.vertex_type:
-                tools = [tool_node.build(user_id=user_id) for tool_node in tools] if tools is not None else []
+                tools = (
+                    [tool_node.build(user_id=user_id) for tool_node in tools]
+                    if tools is not None
+                    else []
+                )
                 # flatten the list of tools if it is a list of lists
                 # first check if it is a list
                 if tools and isinstance(tools, list) and isinstance(tools[0], list):
                     tools = flatten_list(tools)
                 self.params["tools"] = tools
                 prompt_params = [
-                    key for key, value in self.params.items() if isinstance(value, str) and key != "format_instructions"
+                    key
+                    for key, value in self.params.items()
+                    if isinstance(value, str) and key != "format_instructions"
                 ]
             else:
                 prompt_params = ["template"]
@@ -266,14 +279,20 @@ class PromptVertex(Vertex):
                     prompt_text = self.params[param]
                     variables = extract_input_variables_from_prompt(prompt_text)
                     self.params["input_variables"].extend(variables)
-                self.params["input_variables"] = list(set(self.params["input_variables"]))
+                self.params["input_variables"] = list(
+                    set(self.params["input_variables"])
+                )
             elif isinstance(self.params, dict):
                 self.params.pop("input_variables", None)
 
             await self._build(user_id=user_id)
 
     def _built_object_repr(self):
-        if not self.artifacts or self._built_object is None or not hasattr(self._built_object, "format"):
+        if (
+            not self.artifacts
+            or self._built_object is None
+            or not hasattr(self._built_object, "format")
+        ):
             return super()._built_object_repr()
         elif isinstance(self._built_object, UnbuiltObject):
             return super()._built_object_repr()
@@ -285,7 +304,9 @@ class PromptVertex(Vertex):
         # so the prompt format doesn't break
         artifacts.pop("handle_keys", None)
         try:
-            if not hasattr(self._built_object, "template") and hasattr(self._built_object, "prompt"):
+            if not hasattr(self._built_object, "template") and hasattr(
+                self._built_object, "prompt"
+            ):
                 template = self._built_object.prompt.template
             else:
                 template = self._built_object.template
@@ -293,7 +314,11 @@ class PromptVertex(Vertex):
                 if value:
                     replace_key = "{" + key + "}"
                     template = template.replace(replace_key, value)
-            return template if isinstance(template, str) else f"{self.vertex_type}({template})"
+            return (
+                template
+                if isinstance(template, str)
+                else f"{self.vertex_type}({template})"
+            )
         except KeyError:
             return str(self._built_object)
 
@@ -328,7 +353,9 @@ class ChatVertex(Vertex):
                 return f"Task {self.task_id} is not running"
         if self.artifacts:
             # dump as a yaml string
-            yaml_str = yaml.dump(self.artifacts, default_flow_style=False)
+            yaml_str = yaml.dump(
+                self.artifacts, default_flow_style=False, allow_unicode=True
+            )
             return yaml_str
         return super()._built_object_repr()