diff --git a/.tool-versions b/.tool-versions
index edd1509e..ef2a4082 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
 nodejs 20.8.1
-pnpm 8.9.2
+pnpm 9.1.0
diff --git a/package.json b/package.json
index 4807323a..dcac3bbf 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,7 @@
     "eslint": "^8.57.0",
     "eslint-plugin-unicorn": "^52.0.0",
     "eslint-plugin-unused-imports": "^3.2.0",
-    "pnpm": "8.12.1",
+    "pnpm": "9.1.0",
     "prettier": "3.2.5",
     "typescript-eslint": "7.5.0",
     "uvu": "^0.5.6",
diff --git a/snapshots/input/invalid-package-json/package.json b/snapshots/input/invalid-package-json/package.json
index 9939b1ae..a7c2f6b8 100644
--- a/snapshots/input/invalid-package-json/package.json
+++ b/snapshots/input/invalid-package-json/package.json
@@ -9,5 +9,5 @@
   "author": "",
   "license": "ISC",
   "private": true,
-  "packageManager": "pnpm@7.20.0"
+  "packageManager": "pnpm@9.1.0"
 }
diff --git a/snapshots/input/pnpm-workspaces/package.json b/snapshots/input/pnpm-workspaces/package.json
index 2913ce6f..2090f031 100644
--- a/snapshots/input/pnpm-workspaces/package.json
+++ b/snapshots/input/pnpm-workspaces/package.json
@@ -9,5 +9,5 @@
   "author": "",
   "license": "ISC",
   "private": true,
-  "packageManager": "pnpm@7.20.0"
+  "packageManager": "pnpm@9.1.0"
 }
diff --git a/snapshots/input/pnpm-workspaces/pnpm-lock.yaml b/snapshots/input/pnpm-workspaces/pnpm-lock.yaml
index 9d801b45..f3cc6fbf 100644
--- a/snapshots/input/pnpm-workspaces/pnpm-lock.yaml
+++ b/snapshots/input/pnpm-workspaces/pnpm-lock.yaml
@@ -1,4 +1,4 @@
-lockfileVersion: '6.0'
+lockfileVersion: '9.0'
 
 settings:
   autoInstallPeers: true
diff --git a/yarn.lock b/yarn.lock
index 0356e03d..ea811075 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2309,10 +2309,10 @@ pluralize@^8.0.0:
   resolved "https://registry.npmjs.org/pluralize/-/pluralize-8.0.0.tgz"
   integrity sha512-Nc3IT5yHzflTfbjgqWcCPpo7DaKy4FnpB0l/zCAW0Tc7jxAiuqSxHasntB3D7887LSrA93kDJ9IXovxJYxyLCA==
 
-pnpm@8.12.1:
-  version "8.12.1"
-  resolved "https://registry.npmjs.org/pnpm/-/pnpm-8.12.1.tgz"
-  integrity sha512-ZwXqGWattlhwU+bP5v3cN3+BBmIo2vc2xEkAEvRPL/G/DHE7uPMUX84OPvZpx8FfGaWawVeDiVHyNMF7gcplXQ==
+pnpm@9.1.0:
+  version "9.1.0"
+  resolved "https://registry.yarnpkg.com/pnpm/-/pnpm-9.1.0.tgz#217063ce3fcbf44f3051666f38b810f1ddefee4a"
+  integrity sha512-Z/WHmRapKT5c8FnCOFPVcb6vT3U8cH9AyyK+1fsVeMaq07bEEHzLO6CzW+AD62IaFkcayDbIe+tT+dVLtGEnJA==
 
 prelude-ls@^1.2.1:
   version "1.2.1"