diff --git a/langchain/vectorstores/chroma.py b/langchain/vectorstores/chroma.py
index c3d977aa..43ce6c0a 100644
--- a/langchain/vectorstores/chroma.py
+++ b/langchain/vectorstores/chroma.py
@@ -315,6 +315,17 @@ class Chroma(VectorStore):
             )
         self._client.persist()
 
+    def update_document(self, document_id: str, document: Document) -> None:
+        """Update a document in the collection.
+
+        Args:
+            document_id (str): ID of the document to update.
+            document (Document): Document to update.
+        """
+        text = document.page_content
+        metadata = document.metadata
+        self._collection.update_document(document_id, text, metadata)
+
     @classmethod
     def from_texts(
         cls: Type[Chroma],