diff --git a/fern/openapi.json b/fern/openapi.json
index b9def2e2..4e3fead5 100644
--- a/fern/openapi.json
+++ b/fern/openapi.json
@@ -26630,6 +26630,18 @@
             "title": "Agent Id",
             "description": "The unique identifier of the agent that owns the message."
           },
+          "conversation_id": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Conversation Id",
+            "description": "The unique identifier of the conversation that the message belongs to."
+          },
           "created_at": {
             "type": "string",
             "format": "date-time",
@@ -40045,6 +40057,18 @@
             "title": "Agent Id",
             "description": "The unique identifier of the agent that owns the message."
           },
+          "conversation_id": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Conversation Id",
+            "description": "The unique identifier of the conversation that the message belongs to."
+          },
           "created_at": {
             "type": "string",
             "format": "date-time",
@@ -42592,6 +42616,18 @@
             "title": "Agent Id",
             "description": "The unique identifier of the agent that owns the message."
           },
+          "conversation_id": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Conversation Id",
+            "description": "The unique identifier of the conversation that the message belongs to."
+          },
           "created_at": {
             "type": "string",
             "format": "date-time",
@@ -45295,6 +45331,18 @@
             "title": "Agent Id",
             "description": "The unique identifier of the agent that owns the message."
           },
+          "conversation_id": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Conversation Id",
+            "description": "The unique identifier of the conversation that the message belongs to."
+          },
           "created_at": {
             "type": "string",
             "format": "date-time",
diff --git a/letta/schemas/letta_message.py b/letta/schemas/letta_message.py
index 712071ae..b90628dd 100644
--- a/letta/schemas/letta_message.py
+++ b/letta/schemas/letta_message.py
@@ -569,6 +569,10 @@ class SystemMessageListResult(UpdateSystemMessage):
         default=None,
         description="The unique identifier of the agent that owns the message.",
     )
+    conversation_id: str | None = Field(
+        default=None,
+        description="The unique identifier of the conversation that the message belongs to.",
+    )
 
     created_at: datetime = Field(..., description="The time the message was created in ISO format.")
 
@@ -587,6 +591,10 @@ class UserMessageListResult(UpdateUserMessage):
         default=None,
         description="The unique identifier of the agent that owns the message.",
     )
+    conversation_id: str | None = Field(
+        default=None,
+        description="The unique identifier of the conversation that the message belongs to.",
+    )
 
     created_at: datetime = Field(..., description="The time the message was created in ISO format.")
 
@@ -605,6 +613,10 @@ class ReasoningMessageListResult(UpdateReasoningMessage):
         default=None,
         description="The unique identifier of the agent that owns the message.",
     )
+    conversation_id: str | None = Field(
+        default=None,
+        description="The unique identifier of the conversation that the message belongs to.",
+    )
 
     created_at: datetime = Field(..., description="The time the message was created in ISO format.")
 
@@ -623,6 +635,10 @@ class AssistantMessageListResult(UpdateAssistantMessage):
         default=None,
         description="The unique identifier of the agent that owns the message.",
     )
+    conversation_id: str | None = Field(
+        default=None,
+        description="The unique identifier of the conversation that the message belongs to.",
+    )
 
     created_at: datetime = Field(..., description="The time the message was created in ISO format.")
 
diff --git a/letta/schemas/message.py b/letta/schemas/message.py
index 5520249f..22ed104a 100644
--- a/letta/schemas/message.py
+++ b/letta/schemas/message.py
@@ -395,6 +395,7 @@ class Message(BaseMessage):
                             message_type=lm.message_type,
                             content=lm.content,
                             agent_id=message.agent_id,
+                            conversation_id=message.conversation_id,
                             created_at=message.created_at,
                         )
                     )
@@ -405,6 +406,7 @@ class Message(BaseMessage):
                             message_type=lm.message_type,
                             content=lm.content,
                             agent_id=message.agent_id,
+                            conversation_id=message.conversation_id,
                             created_at=message.created_at,
                         )
                     )
@@ -415,6 +417,7 @@ class Message(BaseMessage):
                             message_type=lm.message_type,
                             reasoning=lm.reasoning,
                             agent_id=message.agent_id,
+                            conversation_id=message.conversation_id,
                             created_at=message.created_at,
                         )
                     )
@@ -425,6 +428,7 @@ class Message(BaseMessage):
                             message_type=lm.message_type,
                             content=lm.content,
                             agent_id=message.agent_id,
+                            conversation_id=message.conversation_id,
                             created_at=message.created_at,
                         )
                     )