diff --git a/types/react-datepicker/index.d.ts b/types/react-datepicker/index.d.ts
index 5f07b253f3..e2870092dc 100644
--- a/types/react-datepicker/index.d.ts
+++ b/types/react-datepicker/index.d.ts
@@ -19,6 +19,10 @@ export function registerLocale(localeName: string, localeData: {}): void;
 export function setDefaultLocale(localeName: string): void;
 export function getDefaultLocale(): string;
 
+interface HighlightDates {
+   [className: string]: Date[];
+}
+
 export interface ReactDatePickerProps {
 	adjustDateOnChange?: boolean;
 	allowSameDay?: boolean;
@@ -45,7 +49,7 @@ export interface ReactDatePickerProps {
 	forceShowMonthNavigation?: boolean;
 	formatWeekDay?(date: Date): string;
 	formatWeekNumber?(date: Date): string | number;
-	highlightDates?: Date[];
+	highlightDates?: Array<HighlightDates|Date>;
 	id?: string;
 	includeDates?: Date[];
 	includeTimes?: Date[];
diff --git a/types/react-datepicker/react-datepicker-tests.tsx b/types/react-datepicker/react-datepicker-tests.tsx
index b47c08ed73..5e913be496 100644
--- a/types/react-datepicker/react-datepicker-tests.tsx
+++ b/types/react-datepicker/react-datepicker-tests.tsx
@@ -34,7 +34,7 @@ const defaultLocale = getDefaultLocale();
 	forceShowMonthNavigation
 	formatWeekDay={date => ''}
 	formatWeekNumber={date => 0}
-	highlightDates={[new Date()]}
+	highlightDates={[{ someClassName: [new Date()]}]}
 	id=""
 	includeDates={[new Date()]}
 	includeTimes={[new Date()]}