diff --git a/docs/diff/es2015.core.d.ts.md b/docs/diff/es2015.core.d.ts.md
index b9e5ac9..c0f1876 100644
--- a/docs/diff/es2015.core.d.ts.md
+++ b/docs/diff/es2015.core.d.ts.md
@@ -91,7 +91,8 @@ Index: es2015.core.d.ts
     * target object. Returns the target object.
     * @param target The target object to copy to.
 -   * @param source The source object from which to copy properties.
--   */
++   * @param sources One or more source objects from which to copy properties
+    */
 -  assign<T extends {}, U>(target: T, source: U): T & U;
 -
 -  /**
@@ -112,30 +113,29 @@ Index: es2015.core.d.ts
 -   * @param source3 The third source object from which to copy properties.
 -   */
 -  assign<T extends {}, U, V, W>(
--    target: T,
++  assign<T extends {}, Ts extends readonly any[]>(
+     target: T,
 -    source1: U,
 -    source2: V,
 -    source3: W
 -  ): T & U & V & W;
--
--  /**
--   * Copy the values of all of the enumerable own properties from one or more source objects to a
--   * target object. Returns the target object.
--   * @param target The target object to copy to.
-    * @param sources One or more source objects from which to copy properties
-    */
--  assign(target: object, ...sources: any[]): any;
-+  assign<T, Ts extends readonly any[]>(
-+    target: CheckNonNullable<T>,
 +    ...sources: Ts
 +  ): Intersect<[T, ...Ts]>;
  
    /**
+-   * Copy the values of all of the enumerable own properties from one or more source objects to a
+-   * target object. Returns the target object.
+-   * @param target The target object to copy to.
+-   * @param sources One or more source objects from which to copy properties
+-   */
+-  assign(target: object, ...sources: any[]): any;
+-
+-  /**
     * Returns an array of all symbol properties found directly on object o.
     * @param o Object to retrieve the symbols from.
     */
 -  getOwnPropertySymbols(o: any): symbol[];
-+  getOwnPropertySymbols<T>(o: CheckNonNullable<T>): symbol[];
++  getOwnPropertySymbols(o: {}): symbol[];
  
    /**
     * Returns the names of the enumerable string properties and methods of an object.
diff --git a/docs/diff/es2017.object.d.ts.md b/docs/diff/es2017.object.d.ts.md
index 9ce6196..6f43a9c 100644
--- a/docs/diff/es2017.object.d.ts.md
+++ b/docs/diff/es2017.object.d.ts.md
@@ -5,7 +5,7 @@ Index: es2017.object.d.ts
 ===================================================================
 --- es2017.object.d.ts
 +++ es2017.object.d.ts
-@@ -2,34 +2,42 @@
+@@ -2,34 +2,44 @@
    /**
     * Returns an array of values of the enumerable properties of an object
     * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
@@ -23,7 +23,7 @@ Index: es2017.object.d.ts
 +   * Returns an array of values of the enumerable properties of an object
 +   * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
 +   */
-+  values<T>(o: CheckNonNullable<T>): unknown[];
++  values(o: {}): unknown[];
  
    /**
     * Returns an array of key/values of the enumerable properties of an object
@@ -42,17 +42,18 @@ Index: es2017.object.d.ts
 +   * Returns an array of key/values of the enumerable properties of an object
 +   * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
 +   */
-+  entries<T>(o: CheckNonNullable<T>): [string, unknown][];
++  entries(o: {}): [string, unknown][];
  
    /**
     * Returns an object containing all own property descriptors of an object
     * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
     */
 -  getOwnPropertyDescriptors<T>(
--    o: T
++  getOwnPropertyDescriptors<T extends {}>(
+     o: T
 -  ): { [P in keyof T]: TypedPropertyDescriptor<T[P]> } & {
 -    [x: string]: PropertyDescriptor;
-+  getOwnPropertyDescriptors<T>(o: CheckNonNullable<T>): {
++  ): {
 +    [P in keyof T]: TypedPropertyDescriptor<T[P]>;
 +  } & {
 +    [x: PropertyKey]: PropertyDescriptor;
diff --git a/docs/diff/es5.d.ts.md b/docs/diff/es5.d.ts.md
index 6e2f566..ba90573 100644
--- a/docs/diff/es5.d.ts.md
+++ b/docs/diff/es5.d.ts.md
@@ -64,7 +64,7 @@ Index: es5.d.ts
     * @param o The object that references the prototype.
     */
 -  getPrototypeOf(o: any): any;
-+  getPrototypeOf<T>(o: CheckNonNullable<T>): unknown;
++  getPrototypeOf(o: {}): unknown;
  
    /**
     * Gets the own property descriptor of the specified object.
@@ -72,10 +72,9 @@ Index: es5.d.ts
     * @param o Object that contains the property.
     * @param p Name of the property.
     */
--  getOwnPropertyDescriptor(
+   getOwnPropertyDescriptor(
 -    o: any,
-+  getOwnPropertyDescriptor<T>(
-+    o: CheckNonNullable<T>,
++    o: {},
      p: PropertyKey
    ): PropertyDescriptor | undefined;
  
@@ -85,7 +84,7 @@ Index: es5.d.ts
     * @param o Object that contains the own properties.
     */
 -  getOwnPropertyNames(o: any): string[];
-+  getOwnPropertyNames<T>(o: CheckNonNullable<T>): string[];
++  getOwnPropertyNames(o: {}): string[];
  
    /**
     * Creates an object that has the specified prototype or that has null prototype.
@@ -3557,7 +3556,7 @@ Index: es5.d.ts
  }
  declare var Float64Array: Float64ArrayConstructor;
  
-@@ -5536,4 +5418,31 @@
+@@ -5536,4 +5418,29 @@
      locales?: string | string[],
      options?: Intl.DateTimeFormatOptions
    ): string;
@@ -3578,8 +3577,6 @@ Index: es5.d.ts
 +  ? S
 +  : never;
 +
-+type CheckNonNullable<T> = [T] extends [null | undefined] ? never : T;
-+
 +type JSONValue =
 +  | null
 +  | string
diff --git a/generated/lib.es2015.core.d.ts b/generated/lib.es2015.core.d.ts
index 1c7fa70..f34b0e3 100644
--- a/generated/lib.es2015.core.d.ts
+++ b/generated/lib.es2015.core.d.ts
@@ -319,8 +319,8 @@ interface ObjectConstructor {
    * @param target The target object to copy to.
    * @param sources One or more source objects from which to copy properties
    */
-  assign<T, Ts extends readonly any[]>(
-    target: CheckNonNullable<T>,
+  assign<T extends {}, Ts extends readonly any[]>(
+    target: T,
     ...sources: Ts
   ): Intersect<[T, ...Ts]>;
 
@@ -328,7 +328,7 @@ interface ObjectConstructor {
    * Returns an array of all symbol properties found directly on object o.
    * @param o Object to retrieve the symbols from.
    */
-  getOwnPropertySymbols<T>(o: CheckNonNullable<T>): symbol[];
+  getOwnPropertySymbols(o: {}): symbol[];
 
   /**
    * Returns the names of the enumerable string properties and methods of an object.
diff --git a/generated/lib.es2017.object.d.ts b/generated/lib.es2017.object.d.ts
index 3e3845a..88da500 100644
--- a/generated/lib.es2017.object.d.ts
+++ b/generated/lib.es2017.object.d.ts
@@ -13,7 +13,7 @@ interface ObjectConstructor {
    * Returns an array of values of the enumerable properties of an object
    * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
    */
-  values<T>(o: CheckNonNullable<T>): unknown[];
+  values(o: {}): unknown[];
 
   /**
    * Returns an array of key/values of the enumerable properties of an object
@@ -29,13 +29,15 @@ interface ObjectConstructor {
    * Returns an array of key/values of the enumerable properties of an object
    * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
    */
-  entries<T>(o: CheckNonNullable<T>): [string, unknown][];
+  entries(o: {}): [string, unknown][];
 
   /**
    * Returns an object containing all own property descriptors of an object
    * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
    */
-  getOwnPropertyDescriptors<T>(o: CheckNonNullable<T>): {
+  getOwnPropertyDescriptors<T extends {}>(
+    o: T
+  ): {
     [P in keyof T]: TypedPropertyDescriptor<T[P]>;
   } & {
     [x: PropertyKey]: PropertyDescriptor;
diff --git a/generated/lib.es5.d.ts b/generated/lib.es5.d.ts
index 4f50785..4b3c910 100644
--- a/generated/lib.es5.d.ts
+++ b/generated/lib.es5.d.ts
@@ -168,7 +168,7 @@ interface ObjectConstructor {
    * Returns the prototype of an object.
    * @param o The object that references the prototype.
    */
-  getPrototypeOf<T>(o: CheckNonNullable<T>): unknown;
+  getPrototypeOf(o: {}): unknown;
 
   /**
    * Gets the own property descriptor of the specified object.
@@ -176,8 +176,8 @@ interface ObjectConstructor {
    * @param o Object that contains the property.
    * @param p Name of the property.
    */
-  getOwnPropertyDescriptor<T>(
-    o: CheckNonNullable<T>,
+  getOwnPropertyDescriptor(
+    o: {},
     p: PropertyKey
   ): PropertyDescriptor | undefined;
 
@@ -186,7 +186,7 @@ interface ObjectConstructor {
    * on that object, and are not inherited from the object's prototype. The properties of an object include both fields (objects) and functions.
    * @param o Object that contains the own properties.
    */
-  getOwnPropertyNames<T>(o: CheckNonNullable<T>): string[];
+  getOwnPropertyNames(o: {}): string[];
 
   /**
    * Creates an object that has the specified prototype or that has null prototype.
@@ -6810,8 +6810,6 @@ type Intersect<T extends readonly any[]> = ((
   ? S
   : never;
 
-type CheckNonNullable<T> = [T] extends [null | undefined] ? never : T;
-
 type JSONValue =
   | null
   | string
diff --git a/lib/lib.es2015.core.d.ts b/lib/lib.es2015.core.d.ts
index f05c504..a07223f 100644
--- a/lib/lib.es2015.core.d.ts
+++ b/lib/lib.es2015.core.d.ts
@@ -69,8 +69,8 @@ interface ObjectConstructor {
    * @param target The target object to copy to.
    * @param sources One or more source objects from which to copy properties
    */
-  assign<T, Ts extends readonly any[]>(
-    target: CheckNonNullable<T>,
+  assign<T extends {}, Ts extends readonly any[]>(
+    target: T,
     ...sources: Ts
   ): Intersect<[T, ...Ts]>;
 
@@ -78,7 +78,7 @@ interface ObjectConstructor {
    * Returns an array of all symbol properties found directly on object o.
    * @param o Object to retrieve the symbols from.
    */
-  getOwnPropertySymbols<T>(o: CheckNonNullable<T>): symbol[];
+  getOwnPropertySymbols(o: {}): symbol[];
 
   /**
    * Returns true if the values are the same value, false otherwise.
diff --git a/lib/lib.es2017.object.d.ts b/lib/lib.es2017.object.d.ts
index 49c1405..b4c2f70 100644
--- a/lib/lib.es2017.object.d.ts
+++ b/lib/lib.es2017.object.d.ts
@@ -13,7 +13,7 @@ interface ObjectConstructor {
    * Returns an array of values of the enumerable properties of an object
    * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
    */
-  values<T>(o: CheckNonNullable<T>): unknown[];
+  values(o: {}): unknown[];
 
   /**
    * Returns an array of key/values of the enumerable properties of an object
@@ -29,13 +29,15 @@ interface ObjectConstructor {
    * Returns an array of key/values of the enumerable properties of an object
    * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
    */
-  entries<T>(o: CheckNonNullable<T>): [string, unknown][];
+  entries(o: {}): [string, unknown][];
 
   /**
    * Returns an object containing all own property descriptors of an object
    * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
    */
-  getOwnPropertyDescriptors<T>(o: CheckNonNullable<T>): {
+  getOwnPropertyDescriptors<T extends {}>(
+    o: T
+  ): {
     [P in keyof T]: TypedPropertyDescriptor<T[P]>;
   } & {
     [x: PropertyKey]: PropertyDescriptor;
diff --git a/lib/lib.es5.d.ts b/lib/lib.es5.d.ts
index 8da3f5a..64a30bc 100644
--- a/lib/lib.es5.d.ts
+++ b/lib/lib.es5.d.ts
@@ -13,8 +13,6 @@ type Intersect<T extends readonly any[]> = ((
   ? S
   : never;
 
-type CheckNonNullable<T> = [T] extends [null | undefined] ? never : T;
-
 /**
  * Evaluates JavaScript code and executes it.
  * @param x A String value that contains valid JavaScript code.
@@ -49,7 +47,7 @@ interface ObjectConstructor {
    * Returns the prototype of an object.
    * @param o The object that references the prototype.
    */
-  getPrototypeOf<T>(o: CheckNonNullable<T>): unknown;
+  getPrototypeOf(o: {}): unknown;
 
   /**
    * Gets the own property descriptor of the specified object.
@@ -57,8 +55,8 @@ interface ObjectConstructor {
    * @param o Object that contains the property.
    * @param p Name of the property.
    */
-  getOwnPropertyDescriptor<T>(
-    o: CheckNonNullable<T>,
+  getOwnPropertyDescriptor(
+    o: {},
     p: PropertyKey
   ): PropertyDescriptor | undefined;
 
@@ -67,7 +65,7 @@ interface ObjectConstructor {
    * on that object, and are not inherited from the object's prototype. The properties of an object include both fields (objects) and functions.
    * @param o Object that contains the own properties.
    */
-  getOwnPropertyNames<T>(o: CheckNonNullable<T>): string[];
+  getOwnPropertyNames(o: {}): string[];
 
   /**
    * Creates an object that has the specified prototype or that has null prototype.
diff --git a/package-lock.json b/package-lock.json
index 7e0a7c9..650b42c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,22 +1,22 @@
 {
   "name": "better-typescript-lib",
-  "version": "2.1.0",
+  "version": "2.2.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "better-typescript-lib",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "devDependencies": {
         "@jsdevtools/npm-publish": "^1.4.3",
         "@types/diff": "^5.0.2",
-        "@types/node": "^16.9.4",
+        "@types/node": "^16.9.6",
         "@types/prettier": "^2.6.0",
         "diff": "^5.0.0",
         "prettier": "^2.6.2",
-        "tsd": "^0.18.0",
-        "typescript": "^4.5.2"
+        "tsd": "^0.25.0",
+        "typescript": "^4.9.4"
       }
     },
     "node_modules/@babel/code-frame": {
@@ -190,6 +190,12 @@
         "node": ">= 8"
       }
     },
+    "node_modules/@tsd/typescript": {
+      "version": "4.9.4",
+      "resolved": "https://registry.npmjs.org/@tsd/typescript/-/typescript-4.9.4.tgz",
+      "integrity": "sha512-70j1vy95LsMvciXWJLrQ9pQaaG1inJJ+gZ/dW/bPdzHUH1VTeSl3BBU6QxqFWh5IjPy6s7xHcUw45R71dw4J3w==",
+      "dev": true
+    },
     "node_modules/@types/diff": {
       "version": "5.0.2",
       "resolved": "https://registry.npmjs.org/@types/diff/-/diff-5.0.2.tgz",
@@ -225,9 +231,9 @@
       "dev": true
     },
     "node_modules/@types/node": {
-      "version": "16.9.4",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-16.9.4.tgz",
-      "integrity": "sha512-KDazLNYAGIuJugdbULwFZULF9qQ13yNWEBFnfVpqlpgAAo6H/qnM9RjBgh0A0kmHf3XxAKLdN5mTIng9iUvVLA==",
+      "version": "16.18.9",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-16.18.9.tgz",
+      "integrity": "sha512-nhrqXYxiQ+5B/tPorWum37VgAiefi/wmfJ1QZKGKKecC8/3HqcTTJD0O+VABSPwtseMMF7NCPVT9uGgwn0YqsQ==",
       "dev": true
     },
     "node_modules/@types/normalize-package-data": {
@@ -1420,12 +1426,12 @@
       }
     },
     "node_modules/tsd": {
-      "version": "0.18.0",
-      "resolved": "https://registry.npmjs.org/tsd/-/tsd-0.18.0.tgz",
-      "integrity": "sha512-UIkxm2CLmSjXlQs4zqxgVV9UmzK8VgJ63eBpgkH/ZsMkiUdzxxHvdCCg8F314HDxzfQl2muJEy/TEcXHIFIPXg==",
+      "version": "0.25.0",
+      "resolved": "https://registry.npmjs.org/tsd/-/tsd-0.25.0.tgz",
+      "integrity": "sha512-liUlvKtsdr+70XEZP/kkF6U8+Q9URZi4Pw58ih7a9x3kjJblG8rdVgvG62xcvkgRva1q3yWX5qAxfYZuYiC5CA==",
       "dev": true,
       "dependencies": {
-        "@tsd/typescript": "~4.4.3",
+        "@tsd/typescript": "~4.9.3",
         "eslint-formatter-pretty": "^4.1.0",
         "globby": "^11.0.1",
         "meow": "^9.0.0",
@@ -1436,17 +1442,7 @@
         "tsd": "dist/cli.js"
       },
       "engines": {
-        "node": ">=12"
-      }
-    },
-    "node_modules/tsd/node_modules/@tsd/typescript": {
-      "version": "4.4.4",
-      "resolved": "https://registry.npmjs.org/@tsd/typescript/-/typescript-4.4.4.tgz",
-      "integrity": "sha512-XNaotnbhU6sKSXYg9rVz4L9i9g+j+x1IIgMPztK8KumtMEsrLXcqPBKp/qzmUKwAZEqgHs4+TTz90dUu5/aIqQ==",
-      "dev": true,
-      "bin": {
-        "tsc": "typescript/bin/tsc",
-        "tsserver": "typescript/bin/tsserver"
+        "node": ">=14.16"
       }
     },
     "node_modules/type-detect": {
@@ -1471,9 +1467,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "4.5.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.5.2.tgz",
-      "integrity": "sha512-5BlMof9H1yGt0P8/WF+wPNw6GfctgGjXp5hkblpyT+8rkASSmkUKMXrxR0Xg8ThVCi/JnHQiKXeBaEwCeQwMFw==",
+      "version": "4.9.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.4.tgz",
+      "integrity": "sha512-Uz+dTXYzxXXbsFpM86Wh3dKCxrQqUcVMxwU54orwlJjOpO3ao8L7j5lH+dWfTwgCwIuM9GQ2kvVotzYJMXTBZg==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
@@ -1668,6 +1664,12 @@
         "fastq": "^1.6.0"
       }
     },
+    "@tsd/typescript": {
+      "version": "4.9.4",
+      "resolved": "https://registry.npmjs.org/@tsd/typescript/-/typescript-4.9.4.tgz",
+      "integrity": "sha512-70j1vy95LsMvciXWJLrQ9pQaaG1inJJ+gZ/dW/bPdzHUH1VTeSl3BBU6QxqFWh5IjPy6s7xHcUw45R71dw4J3w==",
+      "dev": true
+    },
     "@types/diff": {
       "version": "5.0.2",
       "resolved": "https://registry.npmjs.org/@types/diff/-/diff-5.0.2.tgz",
@@ -1703,9 +1705,9 @@
       "dev": true
     },
     "@types/node": {
-      "version": "16.9.4",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-16.9.4.tgz",
-      "integrity": "sha512-KDazLNYAGIuJugdbULwFZULF9qQ13yNWEBFnfVpqlpgAAo6H/qnM9RjBgh0A0kmHf3XxAKLdN5mTIng9iUvVLA==",
+      "version": "16.18.9",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-16.18.9.tgz",
+      "integrity": "sha512-nhrqXYxiQ+5B/tPorWum37VgAiefi/wmfJ1QZKGKKecC8/3HqcTTJD0O+VABSPwtseMMF7NCPVT9uGgwn0YqsQ==",
       "dev": true
     },
     "@types/normalize-package-data": {
@@ -2571,25 +2573,17 @@
       "dev": true
     },
     "tsd": {
-      "version": "0.18.0",
-      "resolved": "https://registry.npmjs.org/tsd/-/tsd-0.18.0.tgz",
-      "integrity": "sha512-UIkxm2CLmSjXlQs4zqxgVV9UmzK8VgJ63eBpgkH/ZsMkiUdzxxHvdCCg8F314HDxzfQl2muJEy/TEcXHIFIPXg==",
+      "version": "0.25.0",
+      "resolved": "https://registry.npmjs.org/tsd/-/tsd-0.25.0.tgz",
+      "integrity": "sha512-liUlvKtsdr+70XEZP/kkF6U8+Q9URZi4Pw58ih7a9x3kjJblG8rdVgvG62xcvkgRva1q3yWX5qAxfYZuYiC5CA==",
       "dev": true,
       "requires": {
-        "@tsd/typescript": "~4.4.3",
+        "@tsd/typescript": "~4.9.3",
         "eslint-formatter-pretty": "^4.1.0",
         "globby": "^11.0.1",
         "meow": "^9.0.0",
         "path-exists": "^4.0.0",
         "read-pkg-up": "^7.0.0"
-      },
-      "dependencies": {
-        "@tsd/typescript": {
-          "version": "4.4.4",
-          "resolved": "https://registry.npmjs.org/@tsd/typescript/-/typescript-4.4.4.tgz",
-          "integrity": "sha512-XNaotnbhU6sKSXYg9rVz4L9i9g+j+x1IIgMPztK8KumtMEsrLXcqPBKp/qzmUKwAZEqgHs4+TTz90dUu5/aIqQ==",
-          "dev": true
-        }
       }
     },
     "type-detect": {
@@ -2605,9 +2599,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "4.5.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.5.2.tgz",
-      "integrity": "sha512-5BlMof9H1yGt0P8/WF+wPNw6GfctgGjXp5hkblpyT+8rkASSmkUKMXrxR0Xg8ThVCi/JnHQiKXeBaEwCeQwMFw==",
+      "version": "4.9.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.4.tgz",
+      "integrity": "sha512-Uz+dTXYzxXXbsFpM86Wh3dKCxrQqUcVMxwU54orwlJjOpO3ao8L7j5lH+dWfTwgCwIuM9GQ2kvVotzYJMXTBZg==",
       "dev": true
     },
     "typical": {
diff --git a/package.json b/package.json
index f9219e7..171b86d 100644
--- a/package.json
+++ b/package.json
@@ -7,12 +7,12 @@
   "devDependencies": {
     "@jsdevtools/npm-publish": "^1.4.3",
     "@types/diff": "^5.0.2",
-    "@types/node": "^16.9.4",
+    "@types/node": "^16.9.6",
     "@types/prettier": "^2.6.0",
     "diff": "^5.0.0",
     "prettier": "^2.6.2",
-    "tsd": "^0.18.0",
-    "typescript": "^4.5.2"
+    "tsd": "^0.25.0",
+    "typescript": "^4.9.4"
   },
   "scripts": {
     "build:tsc": "tsc",
diff --git a/tests/package-lock.json b/tests/package-lock.json
index b25cb41..5b2ffb8 100644
--- a/tests/package-lock.json
+++ b/tests/package-lock.json
@@ -26,12 +26,12 @@
       "devDependencies": {
         "@types/node": "^16.9.6",
         "tsd": "^0.25.0",
-        "typescript": "^4.6.4"
+        "typescript": "^4.9.4"
       }
     },
     "../dist-package/dom": {
       "name": "@better-typescript-lib/dom",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -39,7 +39,7 @@
     },
     "../dist-package/es2015": {
       "name": "@better-typescript-lib/es2015",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -47,7 +47,7 @@
     },
     "../dist-package/es2016": {
       "name": "@better-typescript-lib/es2016",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -55,7 +55,7 @@
     },
     "../dist-package/es2017": {
       "name": "@better-typescript-lib/es2017",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -63,7 +63,7 @@
     },
     "../dist-package/es2018": {
       "name": "@better-typescript-lib/es2018",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -71,7 +71,7 @@
     },
     "../dist-package/es2019": {
       "name": "@better-typescript-lib/es2019",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -79,7 +79,7 @@
     },
     "../dist-package/es2020": {
       "name": "@better-typescript-lib/es2020",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -87,7 +87,7 @@
     },
     "../dist-package/es2021": {
       "name": "@better-typescript-lib/es2021",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -95,7 +95,7 @@
     },
     "../dist-package/es2022": {
       "name": "@better-typescript-lib/es2022",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -103,7 +103,7 @@
     },
     "../dist-package/es5": {
       "name": "@better-typescript-lib/es5",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -111,7 +111,7 @@
     },
     "../dist-package/esnext": {
       "name": "@better-typescript-lib/esnext",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "integrity": "sha1-1aczY1lVFLRpoWBIvz39vBC4NWs=",
       "license": "Apache-2.0",
       "peerDependencies": {
@@ -120,7 +120,7 @@
     },
     "../dist-package/header": {
       "name": "@better-typescript-lib/header",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -128,7 +128,7 @@
     },
     "../dist-package/scripthost": {
       "name": "@better-typescript-lib/scripthost",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -136,7 +136,7 @@
     },
     "../dist-package/webworker": {
       "name": "@better-typescript-lib/webworker",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "Apache-2.0",
       "peerDependencies": {
         "typescript": ">=4.5.2"
@@ -1455,9 +1455,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "4.6.4",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.6.4.tgz",
-      "integrity": "sha512-9ia/jWHIEbo49HfjrLGfKbZSuWo9iTMwXO+Ca3pRsSpbsMbc7/IU8NKdCZVRRBafVPGnoJeFL76ZOAA84I9fEg==",
+      "version": "4.9.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.4.tgz",
+      "integrity": "sha512-Uz+dTXYzxXXbsFpM86Wh3dKCxrQqUcVMxwU54orwlJjOpO3ao8L7j5lH+dWfTwgCwIuM9GQ2kvVotzYJMXTBZg==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
@@ -2476,9 +2476,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "4.6.4",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.6.4.tgz",
-      "integrity": "sha512-9ia/jWHIEbo49HfjrLGfKbZSuWo9iTMwXO+Ca3pRsSpbsMbc7/IU8NKdCZVRRBafVPGnoJeFL76ZOAA84I9fEg==",
+      "version": "4.9.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.4.tgz",
+      "integrity": "sha512-Uz+dTXYzxXXbsFpM86Wh3dKCxrQqUcVMxwU54orwlJjOpO3ao8L7j5lH+dWfTwgCwIuM9GQ2kvVotzYJMXTBZg==",
       "dev": true
     },
     "validate-npm-package-license": {
diff --git a/tests/package.json b/tests/package.json
index d7106b9..f410871 100644
--- a/tests/package.json
+++ b/tests/package.json
@@ -15,7 +15,7 @@
   "devDependencies": {
     "@types/node": "^16.9.6",
     "tsd": "^0.25.0",
-    "typescript": "^4.6.4"
+    "typescript": "^4.9.4"
   },
   "dependencies": {
     "@typescript/lib-dom": "file:../dist-package/dom",
diff --git a/tests/src/es2017.object.ts b/tests/src/es2017.object.ts
index 588ca29..6e24974 100644
--- a/tests/src/es2017.object.ts
+++ b/tests/src/es2017.object.ts
@@ -42,7 +42,7 @@ function createGenericRecord<K extends string, V>(
   expectType<(number | { [k: string]: number })[]>(values5);
   expectType<[string, number | { [k: string]: number }][]>(entries5);
 }
-function test<T>(obj: CheckNonNullable<T>) {
+function test(obj: Record<string, unknown>) {
   const values = Object.values(obj);
   expectType<unknown>(values[0]);