diff --git a/typings/commander-tests.ts b/typings/commander-tests.ts
index 57392c667..3bdad012c 100644
--- a/typings/commander-tests.ts
+++ b/typings/commander-tests.ts
@@ -81,6 +81,7 @@ const optionThis1: commander.Command = program.option('-a,--alpha');
 const optionThis2: commander.Command = program.option('-p, --peppers', 'Add peppers');
 const optionThis3: commander.Command = program.option('-s, --string [value]', 'default string', 'value');
 const optionThis4: commander.Command = program.option('-b, --boolean', 'default boolean', false);
+const optionThis5: commander.Command = program.option('-o, --object [value]', 'default object', {key: 'value'});
 
 // example coercion functions from README
 
@@ -104,13 +105,13 @@ function commaSeparatedList(value: string, dummyPrevious: string[]): string[] {
   return value.split(',');
 }
 
-const optionThis5: commander.Command = program.option('-f, --float <number>', 'float argument', parseFloat);
-const optionThis6: commander.Command = program.option('-f, --float <number>', 'float argument', parseFloat, 3.2);
-const optionThis7: commander.Command = program.option('-i, --integer <number>', 'integer argument', myParseInt);
-const optionThis8: commander.Command = program.option('-i, --integer <number>', 'integer argument', myParseInt, 5);
-const optionThis9: commander.Command = program.option('-v, --verbose', 'verbosity that can be increased', increaseVerbosity, 0);
-const optionThis10: commander.Command = program.option('-c, --collect <value>', 'repeatable value', collect, []);
-const optionThis11: commander.Command = program.option('-l, --list <items>', 'comma separated list', commaSeparatedList);
+const optionThis6: commander.Command = program.option('-f, --float <number>', 'float argument', parseFloat);
+const optionThis7: commander.Command = program.option('-f, --float <number>', 'float argument', parseFloat, 3.2);
+const optionThis8: commander.Command = program.option('-i, --integer <number>', 'integer argument', myParseInt);
+const optionThis9: commander.Command = program.option('-i, --integer <number>', 'integer argument', myParseInt, 5);
+const optionThis10: commander.Command = program.option('-v, --verbose', 'verbosity that can be increased', increaseVerbosity, 0);
+const optionThis11: commander.Command = program.option('-c, --collect <value>', 'repeatable value', collect, []);
+const optionThis12: commander.Command = program.option('-l, --list <items>', 'comma separated list', commaSeparatedList);
 
 // requiredOption, same tests as option
 const requiredOptionThis1: commander.Command = program.requiredOption('-a,--alpha');
diff --git a/typings/index.d.ts b/typings/index.d.ts
index c8061ffb3..01ba40bd8 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -171,8 +171,8 @@ declare namespace commander {
      *
      * @returns `this` command for chaining
      */
-    option(flags: string, description?: string, defaultValue?: string | boolean): this;
-    option(flags: string, description: string, regexp: RegExp, defaultValue?: string | boolean): this;
+    option(flags: string, description?: string, defaultValue?: any): this;
+    option(flags: string, description: string, regexp: RegExp, defaultValue?: any): this;
     option<T>(flags: string, description: string, fn: (value: string, previous: T) => T, defaultValue?: T): this;
 
     /**
@@ -181,8 +181,8 @@ declare namespace commander {
      *
      * The `flags` string should contain both the short and long flags, separated by comma, a pipe or space.
      */
-    requiredOption(flags: string, description?: string, defaultValue?: string | boolean): this;
-    requiredOption(flags: string, description: string, regexp: RegExp, defaultValue?: string | boolean): this;
+    requiredOption(flags: string, description?: string, defaultValue?: any): this;
+    requiredOption(flags: string, description: string, regexp: RegExp, defaultValue?: any): this;
     requiredOption<T>(flags: string, description: string, fn: (value: string, previous: T) => T, defaultValue?: T): this;
 
     /**