diff --git a/a3p-integration/proposals/z:acceptance/yarn.lock b/a3p-integration/proposals/z:acceptance/yarn.lock
index 2936f760ac5..ccde5420b4b 100644
--- a/a3p-integration/proposals/z:acceptance/yarn.lock
+++ b/a3p-integration/proposals/z:acceptance/yarn.lock
@@ -3080,9 +3080,9 @@ __metadata:
   linkType: hard
 
 "flatted@npm:^3.2.9":
-  version: 3.3.1
-  resolution: "flatted@npm:3.3.1"
-  checksum: 10c0/324166b125ee07d4ca9bcf3a5f98d915d5db4f39d711fba640a3178b959919aae1f7cfd8aabcfef5826ed8aa8a2aa14cc85b2d7d18ff638ddf4ae3df39573eaf
+  version: 3.4.2
+  resolution: "flatted@npm:3.4.2"
+  checksum: 10c0/a65b67aae7172d6cdf63691be7de6c5cd5adbdfdfe2e9da1a09b617c9512ed794037741ee53d93114276bff3f93cd3b0d97d54f9b316e1e4885dde6e9ffdf7ed
   languageName: node
   linkType: hard