diff --git a/types/redux-form/index.d.ts b/types/redux-form/index.d.ts
index 752dccd876..7005abf1de 100644
--- a/types/redux-form/index.d.ts
+++ b/types/redux-form/index.d.ts
@@ -14,6 +14,7 @@
 //                 Mohamed Shaaban <https://github.com/mshaaban088>
 //                 Ethan Setnik <https://github.com/esetnik>
 //                 Walter Barbagallo <https://github.com/bwlt>
+//                 Kota Marusue <https://github.com/mrsekut>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 3.0
 import {
diff --git a/types/redux-form/lib/FieldArray.d.ts b/types/redux-form/lib/FieldArray.d.ts
index b84d04ad5a..026e75633f 100644
--- a/types/redux-form/lib/FieldArray.d.ts
+++ b/types/redux-form/lib/FieldArray.d.ts
@@ -40,7 +40,7 @@ export interface FieldArrayFieldsProps<FieldValue> {
     length: number;
     map<R>(callback: FieldIterate<FieldValue, R>): R[];
     pop(): FieldValue;
-    push(value: FieldValue): void;
+    push(value?: FieldValue): void;
     remove(index: number): void;
     shift(): FieldValue;
     swap(indexA: number, indexB: number): void;