diff --git a/AnkiConnect.py b/AnkiConnect.py
index 436c771..56465d4 100644
--- a/AnkiConnect.py
+++ b/AnkiConnect.py
@@ -424,6 +424,18 @@ class AnkiBridge:
         if not note.dupeOrEmpty():
             return note
 
+    def updateNoteFields(self, params):
+        collection = self.collection()
+        if collection is None:
+            return
+
+        note = collection.getNote(params['id'])
+        if note is None:
+            raise Exception("Failed to get note:{}".format(params['id']))
+        for name, value in params['fields'].items():
+            if name in note:
+                note[name] = value
+        note.flush()
 
     def addTags(self, notes, tags, add=True):
         self.startEditing()
@@ -1023,6 +1035,9 @@ class AnkiConnect:
 
         return results
 
+    @webApi()
+    def updateNoteFields(self, note):
+        return self.anki.updateNoteFields(note)
 
     @webApi()
     def canAddNotes(self, notes):
diff --git a/README.md b/README.md
index 900b6b0..6e1c676 100644
--- a/README.md
+++ b/README.md
@@ -763,6 +763,38 @@ guarantee that your application continues to function properly in the future.
     }
     ```
 
+#### Note Modification ####
+
+*   **updateNoteFields**
+
+    Modify the fields of an exist note.
+
+    *Sample request*:
+    ```json
+    {
+        "action": "updateNoteFields",
+        "version": 5,
+        "params": {
+            "note": {
+                "id": 1514547547030,
+                "fields": {
+                    "Front": "new front content",
+                    "Back": "new back content"
+                },
+            }
+        }
+    }
+    ```
+
+    *Sample result*:
+    ```json
+    {
+        "result": null,
+        "error": null
+    }
+    ```
+
+
 #### Note Tags ####
 
 *   **addTags**