diff --git a/react/react-addons-global.d.ts b/react/react-addons-global.d.ts
index 5a6608dbbd..891e0d1017 100644
--- a/react/react-addons-global.d.ts
+++ b/react/react-addons-global.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for ReactWithAddons v0.13.0 (internal module)
+// Type definitions for ReactWithAddons v0.13.1 (internal module)
 // Project: http://facebook.github.io/react/
 // Definitions by: Asana <https://asana.com>, AssureSign <http://www.assuresign.com>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
diff --git a/react/react-addons.d.ts b/react/react-addons.d.ts
index c09f5f641d..54fce3ada5 100644
--- a/react/react-addons.d.ts
+++ b/react/react-addons.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for ReactWithAddons v0.13.0 (external module)
+// Type definitions for ReactWithAddons v0.13.1 (external module)
 // Project: http://facebook.github.io/react/
 // Definitions by: Asana <https://asana.com>, AssureSign <http://www.assuresign.com>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
@@ -131,7 +131,7 @@ declare module "react/addons" {
 
     // Base component for plain JS classes
     class Component<P, S> implements ComponentLifecycle<P, S> {
-        constructor(props: P, context: any);
+        constructor(props?: P, context?: any);
         setState(f: (prevState: S, props: P) => S, callback?: () => any): void;
         setState(state: S, callback?: () => any): void;
         forceUpdate(): void;
diff --git a/react/react-global.d.ts b/react/react-global.d.ts
index 2b3a58523b..f7b7859d4b 100644
--- a/react/react-global.d.ts
+++ b/react/react-global.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for React v0.13.0 (internal module)
+// Type definitions for React v0.13.1 (internal module)
 // Project: http://facebook.github.io/react/
 // Definitions by: Asana <https://asana.com>, AssureSign <http://www.assuresign.com>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
@@ -131,7 +131,7 @@ declare module React {
 
     // Base component for plain JS classes
     class Component<P, S> implements ComponentLifecycle<P, S> {
-        constructor(props: P, context: any);
+        constructor(props?: P, context?: any);
         setState(f: (prevState: S, props: P) => S, callback?: () => any): void;
         setState(state: S, callback?: () => any): void;
         forceUpdate(): void;
diff --git a/react/react.d.ts b/react/react.d.ts
index c0d0651675..64796ddf44 100644
--- a/react/react.d.ts
+++ b/react/react.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for React v0.13.0 (external module)
+// Type definitions for React v0.13.1 (external module)
 // Project: http://facebook.github.io/react/
 // Definitions by: Asana <https://asana.com>, AssureSign <http://www.assuresign.com>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
@@ -131,7 +131,7 @@ declare module "react" {
 
     // Base component for plain JS classes
     class Component<P, S> implements ComponentLifecycle<P, S> {
-        constructor(props: P, context: any);
+        constructor(props?: P, context?: any);
         setState(f: (prevState: S, props: P) => S, callback?: () => any): void;
         setState(state: S, callback?: () => any): void;
         forceUpdate(): void;