diff --git a/types/node/index.d.ts b/types/node/index.d.ts
index b545ec718e..9ba96612dc 100644
--- a/types/node/index.d.ts
+++ b/types/node/index.d.ts
@@ -2101,7 +2101,7 @@ declare module "child_process" {
         windowsHide?: boolean;
     }
 
-    export function spawn(command: string, args?: string[], options?: SpawnOptions): ChildProcess;
+    export function spawn(command: string, args?: ReadonlyArray<string>, options?: SpawnOptions): ChildProcess;
 
     export interface ExecOptions {
         cwd?: string;
diff --git a/types/node/v0/index.d.ts b/types/node/v0/index.d.ts
index ef1c485d2d..37f92cbc50 100644
--- a/types/node/v0/index.d.ts
+++ b/types/node/v0/index.d.ts
@@ -881,7 +881,7 @@ declare module "child_process" {
         unref(): void;
     }
 
-    export function spawn(command: string, args?: string[], options?: {
+    export function spawn(command: string, args?: ReadonlyArray<string>, options?: {
         cwd?: string;
         stdio?: any;
         custom?: any;
diff --git a/types/node/v4/index.d.ts b/types/node/v4/index.d.ts
index 3a7825dff8..db5518575d 100644
--- a/types/node/v4/index.d.ts
+++ b/types/node/v4/index.d.ts
@@ -1240,7 +1240,7 @@ declare module "child_process" {
         gid?: number;
         shell?: boolean | string;
     }
-    export function spawn(command: string, args?: string[], options?: SpawnOptions): ChildProcess;
+    export function spawn(command: string, args?: ReadonlyArray<string>, options?: SpawnOptions): ChildProcess;
 
     export interface ExecOptions {
         cwd?: string;
diff --git a/types/node/v6/index.d.ts b/types/node/v6/index.d.ts
index e615662fe6..9859d0ba09 100644
--- a/types/node/v6/index.d.ts
+++ b/types/node/v6/index.d.ts
@@ -1787,7 +1787,7 @@ declare module "child_process" {
         gid?: number;
         shell?: boolean | string;
     }
-    export function spawn(command: string, args?: string[], options?: SpawnOptions): ChildProcess;
+    export function spawn(command: string, args?: ReadonlyArray<string>, options?: SpawnOptions): ChildProcess;
 
     export interface ExecOptions {
         cwd?: string;
diff --git a/types/node/v7/index.d.ts b/types/node/v7/index.d.ts
index 366eb247fd..7d2d34cd8b 100644
--- a/types/node/v7/index.d.ts
+++ b/types/node/v7/index.d.ts
@@ -1847,7 +1847,7 @@ declare module "child_process" {
         gid?: number;
         shell?: boolean | string;
     }
-    export function spawn(command: string, args?: string[], options?: SpawnOptions): ChildProcess;
+    export function spawn(command: string, args?: ReadonlyArray<string>, options?: SpawnOptions): ChildProcess;
 
     export interface ExecOptions {
         cwd?: string;
diff --git a/types/node/v8/index.d.ts b/types/node/v8/index.d.ts
index 05d617dd58..647d479683 100644
--- a/types/node/v8/index.d.ts
+++ b/types/node/v8/index.d.ts
@@ -2091,7 +2091,7 @@ declare module "child_process" {
         windowsHide?: boolean;
     }
 
-    export function spawn(command: string, args?: string[], options?: SpawnOptions): ChildProcess;
+    export function spawn(command: string, args?: ReadonlyArray<string>, options?: SpawnOptions): ChildProcess;
 
     export interface ExecOptions {
         cwd?: string;
diff --git a/types/node/v9/index.d.ts b/types/node/v9/index.d.ts
index 5012d70183..d739a5c523 100644
--- a/types/node/v9/index.d.ts
+++ b/types/node/v9/index.d.ts
@@ -2091,7 +2091,7 @@ declare module "child_process" {
         windowsHide?: boolean;
     }
 
-    export function spawn(command: string, args?: string[], options?: SpawnOptions): ChildProcess;
+    export function spawn(command: string, args?: ReadonlyArray<string>, options?: SpawnOptions): ChildProcess;
 
     export interface ExecOptions {
         cwd?: string;