diff --git a/package.json b/package.json
index a6af078f75..b2a0f86ee1 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
 		"type": "git",
 		"url": "https://github.com/misskey-dev/misskey.git"
 	},
-	"packageManager": "pnpm@10.26.2",
+	"packageManager": "pnpm@10.27.0",
 	"workspaces": [
 		"packages/misskey-js",
 		"packages/i18n",
@@ -79,7 +79,7 @@
 		"eslint": "9.39.2",
 		"globals": "16.5.0",
 		"ncp": "2.0.0",
-		"pnpm": "10.26.2",
+		"pnpm": "10.27.0",
 		"typescript": "5.9.3",
 		"start-server-and-test": "2.1.3"
 	},
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 82cfbb6891..4e58e471a3 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -75,8 +75,8 @@ importers:
         specifier: 2.0.0
         version: 2.0.0
       pnpm:
-        specifier: 10.26.2
-        version: 10.26.2
+        specifier: 10.27.0
+        version: 10.27.0
       start-server-and-test:
         specifier: 2.1.3
         version: 2.1.3
@@ -9134,8 +9134,8 @@ packages:
     resolution: {integrity: sha512-40QW5YalBNfQo5yRYmiw7Yz6TKKVr3h6970B2YE+3fQpsWcrbj1PzJgxeJ19DRQjhMbKPIuMY8rFaXc8moolVw==}
     engines: {node: '>=10.13.0'}
 
-  pnpm@10.26.2:
-    resolution: {integrity: sha512-DjCP8gBfx0EDZvFU9iX2YxqysWsdLnAjhETdaunWMKhILZKkURRN68SSQWiW7Rb3sRSobsaLhASyRDhp5o/9pg==}
+  pnpm@10.27.0:
+    resolution: {integrity: sha512-ctaZ2haxF5wUup5k3HHJpAmIy9xlwmTLDkidt96RfyDc9NZNhyNiXylpulLUt+KhFwaC2awqXcrqq3MrfhbwSg==}
     engines: {node: '>=18.12'}
     hasBin: true
 
@@ -11158,10 +11158,12 @@ packages:
   whatwg-encoding@2.0.0:
     resolution: {integrity: sha512-p41ogyeMUrw3jWclHWTQg1k05DSVXPLcVxRTYsXUk+ZooOCZLcoYgPZ/HL/D/N+uQPOtcp1me1WhBEaX02mhWg==}
     engines: {node: '>=12'}
+    deprecated: Use @exodus/bytes instead for a more spec-conformant and faster implementation
 
   whatwg-encoding@3.1.1:
     resolution: {integrity: sha512-6qN4hJdMwfYBtE3YBTTHhoeuUrDBPZmbQaxWAqSALV/MeEnR5z1xd8UKud2RAkFoPkmB+hli1TZSnyi84xz1vQ==}
     engines: {node: '>=18'}
+    deprecated: Use @exodus/bytes instead for a more spec-conformant and faster implementation
 
   whatwg-mimetype@3.0.0:
     resolution: {integrity: sha512-nt+N2dzIutVRxARx1nghPKGv1xHikU7HKdfafKkLNLindmPU/ch3U31NOCGGA/dmPcmb1VlofO0vnKAcsm0o/Q==}
@@ -21173,7 +21175,7 @@ snapshots:
 
   pngjs@5.0.0: {}
 
-  pnpm@10.26.2: {}
+  pnpm@10.27.0: {}
 
   polished@4.3.1:
     dependencies: