diff --git a/package.json b/package.json
index cd4eb712d7..9835639f19 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@mastodon/mastodon",
   "license": "AGPL-3.0-or-later",
-  "packageManager": "yarn@4.8.1",
+  "packageManager": "yarn@4.9.0",
   "engines": {
     "node": ">=18"
   },
diff --git a/streaming/package.json b/streaming/package.json
index f376b89c3a..4b3aa72579 100644
--- a/streaming/package.json
+++ b/streaming/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@mastodon/streaming",
   "license": "AGPL-3.0-or-later",
-  "packageManager": "yarn@4.8.1",
+  "packageManager": "yarn@4.9.0",
   "engines": {
     "node": ">=18"
   },