source/index.ts

@@ -825,7 +825,7 @@ export function isOddInteger(value: unknown): boolean {
 }
 
 export function isOneOf<T extends readonly unknown[]>(values: T): (value: unknown) => value is T[number] {
-	return (value: unknown): value is T[number] => values.includes(value);
+	return (value: unknown): value is T[number] => values.includes(value as T[number]);
 }
 
 export function isPlainObject<Value = unknown>(value: unknown): value is Record<PropertyKey, Value> {

source/utilities.ts

@@ -1,3 +1,3 @@
 export function keysOf<T extends Record<PropertyKey, unknown>>(value: T): Array<keyof T> {
-	return Object.keys(value) as Array<keyof T>; // eslint-disable-line @typescript-eslint/no-unnecessary-type-assertion
+	return Object.keys(value) as Array<keyof T>;
 }