diff --git a/package.json b/package.json
index 2ede5724..28da772c 100644
--- a/package.json
+++ b/package.json
@@ -350,7 +350,7 @@
     "test-webcrypto": "WEBCRYPTO=true npm test"
   },
   "devDependencies": {
-    "@types/node": "^16.0.0",
+    "@types/node": "^16.3.2",
     "@typescript-eslint/eslint-plugin": "^4.28.0",
     "ava": "^3.13.0",
     "bowser": "^2.11.0",
diff --git a/src/runtime/node/is_key_object.ts b/src/runtime/node/is_key_object.ts
index 9b09cd66..75963f03 100644
--- a/src/runtime/node/is_key_object.ts
+++ b/src/runtime/node/is_key_object.ts
@@ -4,11 +4,9 @@ import * as util from 'util'
 // eslint-disable-next-line import/no-mutable-exports
 let impl: (obj: unknown) => obj is KeyObject
 
-// @ts-expect-error
 if (util.types.isKeyObject) {
   impl = function isKeyObject(obj): obj is KeyObject {
-    // @ts-expect-error
-    return <boolean>util.types.isKeyObject(obj)
+    return util.types.isKeyObject(obj)
   }
 } else {
   impl = function isKeyObject(obj): obj is KeyObject {
diff --git a/src/runtime/node/webcrypto.ts b/src/runtime/node/webcrypto.ts
index 51a4d984..90309c34 100644
--- a/src/runtime/node/webcrypto.ts
+++ b/src/runtime/node/webcrypto.ts
@@ -8,11 +8,9 @@ export default webcrypto
 
 let impl: (obj: unknown) => obj is CryptoKey
 
-// @ts-expect-error
 if (util.types.isCryptoKey) {
   impl = function isCryptoKey(obj): obj is CryptoKey {
-    // @ts-expect-error
-    return <boolean>util.types.isCryptoKey(obj)
+    return util.types.isCryptoKey(obj)
   }
 } else if (webcrypto) {
   impl = function isCryptoKey(obj): obj is CryptoKey {