diff --git a/.nvmrc b/.nvmrc
index 3c03207..209e3ef 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-18
+20
diff --git a/package.json b/package.json
index 8426817..a9c1d1c 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
   },
   "devDependencies": {
     "@tsconfig/node18": "^18.2.0",
-    "@types/node": "^18.17.4",
+    "@types/node": "^20.9.3",
     "@u3u/eslint-config": "^2.9.1",
     "@u3u/prettier-config": "^3.0.1",
     "@vitest/coverage-v8": "^0.34.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 88e194a..6f52a4c 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -23,8 +23,8 @@ devDependencies:
     specifier: ^18.2.0
     version: 18.2.0
   '@types/node':
-    specifier: ^18.17.4
-    version: 18.17.4
+    specifier: ^20.9.3
+    version: 20.9.3
   '@u3u/eslint-config':
     specifier: ^2.9.1
     version: 2.9.1(eslint@8.46.0)(typescript@5.1.6)
@@ -764,8 +764,10 @@ packages:
     resolution: {integrity: sha512-iiUgKzV9AuaEkZqkOLDIvlQiL6ltuZd9tGcW3gwpnX8JbuiuhFlEGmmFXEXkN50Cvq7Os88IY2v0dkDqXYWVgA==}
     dev: true
 
-  /@types/node@18.17.4:
-    resolution: {integrity: sha512-ATL4WLgr7/W40+Sp1WnNTSKbgVn6Pvhc/2RHAdt8fl6NsQyp4oPCi2eKcGOvA494bwf1K/W6nGgZ9TwDqvpjdw==}
+  /@types/node@20.9.3:
+    resolution: {integrity: sha512-nk5wXLAXGBKfrhLB0cyHGbSqopS+nz0BUgZkUQqSHSSgdee0kssp1IAqlQOu333bW+gMNs2QREx7iynm19Abxw==}
+    dependencies:
+      undici-types: 5.26.5
     dev: true
 
   /@types/normalize-package-data@2.4.1:
@@ -5189,6 +5191,10 @@ packages:
       which-boxed-primitive: 1.0.2
     dev: true
 
+  /undici-types@5.26.5:
+    resolution: {integrity: sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==}
+    dev: true
+
   /unist-util-stringify-position@2.0.3:
     resolution: {integrity: sha512-3faScn5I+hy9VleOq/qNbAd6pAx7iH5jYBMS9I1HgQVijz/4mv5Bvw5iw1sC/90CODiKo81G/ps8AJrISn687g==}
     dependencies:
@@ -5260,7 +5266,7 @@ packages:
       spdx-correct: 3.2.0
       spdx-expression-parse: 3.0.1
 
-  /vite-node@0.34.1(@types/node@18.17.4):
+  /vite-node@0.34.1(@types/node@20.9.3):
     resolution: {integrity: sha512-odAZAL9xFMuAg8aWd7nSPT+hU8u2r9gU3LRm9QKjxBEF2rRdWpMuqkrkjvyVQEdNFiBctqr2Gg4uJYizm5Le6w==}
     engines: {node: '>=v14.18.0'}
     hasBin: true
@@ -5270,7 +5276,7 @@ packages:
       mlly: 1.4.0
       pathe: 1.1.1
       picocolors: 1.0.0
-      vite: 4.4.9(@types/node@18.17.4)
+      vite: 4.4.9(@types/node@20.9.3)
     transitivePeerDependencies:
       - '@types/node'
       - less
@@ -5282,7 +5288,7 @@ packages:
       - terser
     dev: true
 
-  /vite@4.4.9(@types/node@18.17.4):
+  /vite@4.4.9(@types/node@20.9.3):
     resolution: {integrity: sha512-2mbUn2LlUmNASWwSCNSJ/EG2HuSRTnVNaydp6vMCm5VIqJsjMfbIWtbH2kDuwUVW5mMUKKZvGPX/rqeqVvv1XA==}
     engines: {node: ^14.18.0 || >=16.0.0}
     hasBin: true
@@ -5310,7 +5316,7 @@ packages:
       terser:
         optional: true
     dependencies:
-      '@types/node': 18.17.4
+      '@types/node': 20.9.3
       esbuild: 0.18.20
       postcss: 8.4.27
       rollup: 3.27.2
@@ -5351,7 +5357,7 @@ packages:
     dependencies:
       '@types/chai': 4.3.5
       '@types/chai-subset': 1.3.3
-      '@types/node': 18.17.4
+      '@types/node': 20.9.3
       '@vitest/expect': 0.34.1
       '@vitest/runner': 0.34.1
       '@vitest/snapshot': 0.34.1
@@ -5371,8 +5377,8 @@ packages:
       strip-literal: 1.3.0
       tinybench: 2.5.0
       tinypool: 0.7.0
-      vite: 4.4.9(@types/node@18.17.4)
-      vite-node: 0.34.1(@types/node@18.17.4)
+      vite: 4.4.9(@types/node@20.9.3)
+      vite-node: 0.34.1(@types/node@20.9.3)
       why-is-node-running: 2.2.2
     transitivePeerDependencies:
       - less