diff --git a/yargs/index.d.ts b/yargs/index.d.ts
index a1de96fbd5..da23a91f7f 100644
--- a/yargs/index.d.ts
+++ b/yargs/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for yargs 6.3.0
+// Type definitions for yargs 6.5.0
 // Project: https://github.com/chevex/yargs
 // Definitions by: Martin Poelstra <https://github.com/poelstra>, Mizunashi Mana <https://github.com/mizunashi-mana>, Jeffery Grajkowski <https://github.com/pushplay>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
@@ -118,7 +118,7 @@ declare namespace yargs {
         epilog(msg: string): Argv;
         epilogue(msg: string): Argv;
 
-        version(version: string, option?: string, description?: string): Argv;
+        version(version?: string, option?: string, description?: string): Argv;
         version(version: () => string, option?: string, description?: string): Argv;
 
         showHelpOnFail(enable: boolean, message?: string): Argv;
diff --git a/yargs/yargs-tests.ts b/yargs/yargs-tests.ts
index bcdd0e5368..0298df661b 100644
--- a/yargs/yargs-tests.ts
+++ b/yargs/yargs-tests.ts
@@ -306,15 +306,18 @@ function Argv$showHelp() {
 
 function Argv$version() {
 	var argv1 = yargs
-		.version('1.0.0');
+		.version();
 
 	var argv2 = yargs
-		.version('1.0.0', '--version');
+		.version('1.0.0');
 
 	var argv3 = yargs
-		.version('1.0.0', '--version', 'description');
+		.version('1.0.0', '--version');
 
 	var argv4 = yargs
+		.version('1.0.0', '--version', 'description');
+
+	var argv5 = yargs
 		.version(function () { return '1.0.0'; }, '--version', 'description');
 }