diff --git a/bluebird/bluebird.d.ts b/bluebird/bluebird.d.ts
index 5ee5c0cad4..ca8acb2446 100644
--- a/bluebird/bluebird.d.ts
+++ b/bluebird/bluebird.d.ts
@@ -75,11 +75,11 @@ class Bluebird<R> implements Bluebird.Thenable<R>, Bluebird.Inspection<R> {
   catch<U>(predicate: (error: any) => boolean, onReject: (error: any) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
   caught<U>(predicate: (error: any) => boolean, onReject: (error: any) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
   
-  catch<E>(ErrorClass: new (...args: any[]) => E, onReject: (error: E) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
-  caught<E>(ErrorClass: new (...args: any[]) => E, onReject: (error: E) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
+  catch<E extends Error>(ErrorClass: new (...args: any[]) => E, onReject: (error: E) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
+  caught<E extends Error>(ErrorClass: new (...args: any[]) => E, onReject: (error: E) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
 
-  catch<E, U>(ErrorClass: new (...args: any[]) => E, onReject: (error: E) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
-  caught<E, U>(ErrorClass: new (...args: any[]) => E, onReject: (error: E) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
+  catch<E extends Error, U>(ErrorClass: new (...args: any[]) => E, onReject: (error: E) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
+  caught<E extends Error, U>(ErrorClass: new (...args: any[]) => E, onReject: (error: E) => U | Bluebird.Thenable<U>): Bluebird<U | R>;
   
   catch(predicate: Object, onReject: (error: any) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;
   caught(predicate: Object, onReject: (error: any) => R | Bluebird.Thenable<R> | void | Bluebird.Thenable<void>): Bluebird<R>;