diff --git a/types/node/index.d.ts b/types/node/index.d.ts
index d228742629..b90c17fa0a 100644
--- a/types/node/index.d.ts
+++ b/types/node/index.d.ts
@@ -2253,33 +2253,33 @@ declare module "child_process" {
 
     export function execFile(file: string): ChildProcess;
     export function execFile(file: string, options: ({ encoding?: string | null } & ExecFileOptions) | undefined | null): ChildProcess;
-    export function execFile(file: string, args: string[] | undefined | null): ChildProcess;
-    export function execFile(file: string, args: string[] | undefined | null, options: ({ encoding?: string | null } & ExecFileOptions) | undefined | null): ChildProcess;
+    export function execFile(file: string, args?: ReadonlyArray<string> | null): ChildProcess;
+    export function execFile(file: string, args: ReadonlyArray<string> | undefined | null, options: ({ encoding?: string | null } & ExecFileOptions) | undefined | null): ChildProcess;
 
     // no `options` definitely means stdout/stderr are `string`.
     export function execFile(file: string, callback: (error: Error | null, stdout: string, stderr: string) => void): ChildProcess;
-    export function execFile(file: string, args: string[] | undefined | null, callback: (error: Error | null, stdout: string, stderr: string) => void): ChildProcess;
+    export function execFile(file: string, args: ReadonlyArray<string> | undefined | null, callback: (error: Error | null, stdout: string, stderr: string) => void): ChildProcess;
 
     // `options` with `"buffer"` or `null` for `encoding` means stdout/stderr are definitely `Buffer`.
     export function execFile(file: string, options: ExecFileOptionsWithBufferEncoding, callback: (error: Error | null, stdout: Buffer, stderr: Buffer) => void): ChildProcess;
-    export function execFile(file: string, args: string[] | undefined | null, options: ExecFileOptionsWithBufferEncoding, callback: (error: Error | null, stdout: Buffer, stderr: Buffer) => void): ChildProcess;
+    export function execFile(file: string, args: ReadonlyArray<string> | undefined | null, options: ExecFileOptionsWithBufferEncoding, callback: (error: Error | null, stdout: Buffer, stderr: Buffer) => void): ChildProcess;
 
     // `options` with well known `encoding` means stdout/stderr are definitely `string`.
     export function execFile(file: string, options: ExecFileOptionsWithStringEncoding, callback: (error: Error | null, stdout: string, stderr: string) => void): ChildProcess;
-    export function execFile(file: string, args: string[] | undefined | null, options: ExecFileOptionsWithStringEncoding, callback: (error: Error | null, stdout: string, stderr: string) => void): ChildProcess;
+    export function execFile(file: string, args: ReadonlyArray<string> | undefined | null, options: ExecFileOptionsWithStringEncoding, callback: (error: Error | null, stdout: string, stderr: string) => void): ChildProcess;
 
     // `options` with an `encoding` whose type is `string` means stdout/stderr could either be `Buffer` or `string`.
     // There is no guarantee the `encoding` is unknown as `string` is a superset of `BufferEncoding`.
     export function execFile(file: string, options: ExecFileOptionsWithOtherEncoding, callback: (error: Error | null, stdout: string | Buffer, stderr: string | Buffer) => void): ChildProcess;
-    export function execFile(file: string, args: string[] | undefined | null, options: ExecFileOptionsWithOtherEncoding, callback: (error: Error | null, stdout: string | Buffer, stderr: string | Buffer) => void): ChildProcess;
+    export function execFile(file: string, args: ReadonlyArray<string> | undefined | null, options: ExecFileOptionsWithOtherEncoding, callback: (error: Error | null, stdout: string | Buffer, stderr: string | Buffer) => void): ChildProcess;
 
     // `options` without an `encoding` means stdout/stderr are definitely `string`.
     export function execFile(file: string, options: ExecFileOptions, callback: (error: Error | null, stdout: string, stderr: string) => void): ChildProcess;
-    export function execFile(file: string, args: string[] | undefined | null, options: ExecFileOptions, callback: (error: Error | null, stdout: string, stderr: string) => void): ChildProcess;
+    export function execFile(file: string, args: ReadonlyArray<string> | undefined | null, options: ExecFileOptions, callback: (error: Error | null, stdout: string, stderr: string) => void): ChildProcess;
 
     // fallback if nothing else matches. Worst case is always `string | Buffer`.
     export function execFile(file: string, options: ({ encoding?: string | null } & ExecFileOptions) | undefined | null, callback: ((error: Error | null, stdout: string | Buffer, stderr: string | Buffer) => void) | undefined | null): ChildProcess;
-    export function execFile(file: string, args: string[] | undefined | null, options: ({ encoding?: string | null } & ExecFileOptions) | undefined | null, callback: ((error: Error | null, stdout: string | Buffer, stderr: string | Buffer) => void) | undefined | null): ChildProcess;
+    export function execFile(file: string, args: ReadonlyArray<string> | undefined | null, options: ({ encoding?: string | null } & ExecFileOptions) | undefined | null, callback: ((error: Error | null, stdout: string | Buffer, stderr: string | Buffer) => void) | undefined | null): ChildProcess;
 
     // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
     export namespace execFile {
@@ -2308,7 +2308,7 @@ declare module "child_process" {
         gid?: number;
         windowsVerbatimArguments?: boolean;
     }
-    export function fork(modulePath: string, args?: string[], options?: ForkOptions): ChildProcess;
+    export function fork(modulePath: string, args?: ReadonlyArray<string>, options?: ForkOptions): ChildProcess;
 
     export interface SpawnSyncOptions {
         cwd?: string;
@@ -2344,9 +2344,9 @@ declare module "child_process" {
     export function spawnSync(command: string, options?: SpawnSyncOptionsWithStringEncoding): SpawnSyncReturns<string>;
     export function spawnSync(command: string, options?: SpawnSyncOptionsWithBufferEncoding): SpawnSyncReturns<Buffer>;
     export function spawnSync(command: string, options?: SpawnSyncOptions): SpawnSyncReturns<Buffer>;
-    export function spawnSync(command: string, args?: string[], options?: SpawnSyncOptionsWithStringEncoding): SpawnSyncReturns<string>;
-    export function spawnSync(command: string, args?: string[], options?: SpawnSyncOptionsWithBufferEncoding): SpawnSyncReturns<Buffer>;
-    export function spawnSync(command: string, args?: string[], options?: SpawnSyncOptions): SpawnSyncReturns<Buffer>;
+    export function spawnSync(command: string, args?: ReadonlyArray<string>, options?: SpawnSyncOptionsWithStringEncoding): SpawnSyncReturns<string>;
+    export function spawnSync(command: string, args?: ReadonlyArray<string>, options?: SpawnSyncOptionsWithBufferEncoding): SpawnSyncReturns<Buffer>;
+    export function spawnSync(command: string, args?: ReadonlyArray<string>, options?: SpawnSyncOptions): SpawnSyncReturns<Buffer>;
 
     export interface ExecSyncOptions {
         cwd?: string;
@@ -2396,9 +2396,9 @@ declare module "child_process" {
     export function execFileSync(command: string, options?: ExecFileSyncOptionsWithStringEncoding): string;
     export function execFileSync(command: string, options?: ExecFileSyncOptionsWithBufferEncoding): Buffer;
     export function execFileSync(command: string, options?: ExecFileSyncOptions): Buffer;
-    export function execFileSync(command: string, args?: string[], options?: ExecFileSyncOptionsWithStringEncoding): string;
-    export function execFileSync(command: string, args?: string[], options?: ExecFileSyncOptionsWithBufferEncoding): Buffer;
-    export function execFileSync(command: string, args?: string[], options?: ExecFileSyncOptions): Buffer;
+    export function execFileSync(command: string, args?: ReadonlyArray<string>, options?: ExecFileSyncOptionsWithStringEncoding): string;
+    export function execFileSync(command: string, args?: ReadonlyArray<string>, options?: ExecFileSyncOptionsWithBufferEncoding): Buffer;
+    export function execFileSync(command: string, args?: ReadonlyArray<string>, options?: ExecFileSyncOptions): Buffer;
 }
 
 declare module "url" {