diff --git a/typings/index.d.ts b/typings/index.d.ts
index 73c606a5d..5f34c4c0f 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -293,7 +293,8 @@ export class Command {
    *
    * You can optionally supply the  flags and description to override the defaults.
    */
-  version(str?: string, flags?: string, description?: string): this;
+  version(str: string, flags?: string, description?: string): this;
+  version(): string;
 
   /**
    * Define a command, implemented using an action handler.
diff --git a/typings/index.test-d.ts b/typings/index.test-d.ts
index 734036fad..b5019cf0c 100644
--- a/typings/index.test-d.ts
+++ b/typings/index.test-d.ts
@@ -36,6 +36,7 @@ expectType<commander.Command | null>(program.parent);
 expectType<commander.Command>(program.version('1.2.3'));
 expectType<commander.Command>(program.version('1.2.3', '-r,--revision'));
 expectType<commander.Command>(program.version('1.2.3', '-r,--revision', 'show revision information'));
+expectType<string>(program.version());
 
 // command (and CommandOptions)
 expectType<commander.Command>(program.command('action'));