diff --git a/definitions/npm/lodash_v4.x.x/flow_v0.63.x-/lodash_v4.x.x.js b/definitions/npm/lodash_v4.x.x/flow_v0.63.x-/lodash_v4.x.x.js
index <HASH>..<HASH> 100644
--- a/definitions/npm/lodash_v4.x.x/flow_v0.63.x-/lodash_v4.x.x.js
+++ b/definitions/npm/lodash_v4.x.x/flow_v0.63.x-/lodash_v4.x.x.js
@@ -927,7 +927,7 @@ declare module "lodash" {
     random(lower?: number, upper?: number, floating?: boolean): number;
 
     // Object
-    assign(object?: ?Object, ...sources?: Array<Object>): Object;
+    assign(object?: ?Object, ...sources?: Array<?Object>): Object;
     assignIn(): {};
     assignIn<A, B>(a: A, b: B): A & B;
     assignIn<A, B, C>(a: A, b: B, c: C): A & B & C;
lodash: assign can receive null further arguments (#<I>)