No overload matches this call

The following snippet is generating an error:

import client from "./driver";

export interface Course {
    id?: number;
    name: string;
    description: string;
    price: number;
    image: string;
}

export interface UpdateCourse {
    name?: string;
    description?: string;
    price?: number;
    image?: string;
}

export const updateCourse = async (id: number, course: UpdateCourse) => {
    // Get list of non-null keys
    const keys = Object.keys(course).filter(
        (key) => course[key as keyof UpdateCourse] // If this is not null
    );
    const res = await client<Course[]>`UPDATE courses SET  ${client(course, keys)} WHERE id = ${id} RETURNING *`;
};

Error:

No overload matches this call.
  Argument of type '[string[]]' is not assignable to parameter of type 'readonly ("name" | "description" | "price" | "image")[] | [readonly ("name" | "description" | "price" | "image")[]]'.
    Type '[string[]]' is not assignable to type '[readonly ("name" | "description" | "price" | "image")[]]'.
      Type 'string[]' is not assignable to type 'readonly ("name" | "description" | "price" | "image")[]'.
        Type 'string' is not assignable to type '"name" | "description" | "price" | "image"'.
  Overload 2 of 2, '(template: TemplateStringsArray, ...parameters: readonly ParameterOrFragment<never>[]): PendingQuery<any>', gave the following error.
    Argument of type 'UpdateCourse' is not assignable to parameter of type 'TemplateStringsArray'.
      Type 'UpdateCourse' is missing the following properties from type 'TemplateStringsArray': raw, length, concat, join, and 27 more.

The function does work, but ts it's returning an error either way.

I'm using version 3.4.4

Start with the client imported from ./driver and the updateCourse call shown in the issue, then inspect the postgres 3.4.4 type declarations involved in client(course, keys). Done means the provided TypeScript snippet type-checks without the overload error while retaining its current query behavior.