diff --git a/changelog/v1.json b/changelog/v1.json
index c442ab2515a5..f308773bac37 100644
--- a/changelog/v1.json
+++ b/changelog/v1.json
@@ -1,4 +1,11 @@
 [
+  {
+    "children": {
+      "fixes": ["Fix fallback behavior of default mode in AgentRuntime."]
+    },
+    "date": "2024-11-27",
+    "version": "1.34.3"
+  },
   {
     "children": {
       "improvements": ["Improve thread i18n locale."]