diff --git a/node/node-0.10.d.ts b/node/node-0.10.d.ts
index ba170e864d..c77c724a6b 100644
--- a/node/node-0.10.d.ts
+++ b/node/node-0.10.d.ts
@@ -1191,8 +1191,8 @@ declare module "crypto" {
         setPrivateKey(public_key: string, encoding?: string): void;
     }
     export function getDiffieHellman(group_name: string): DiffieHellman;
-    export function pbkdf2(password: string, salt: string, iterations: number, keylen: number, callback: (err: Error, derivedKey: Buffer) => any): void;
-    export function pbkdf2Sync(password: string, salt: string, iterations: number, keylen: number) : Buffer;
+    export function pbkdf2(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, callback: (err: Error, derivedKey: Buffer) => any): void;
+    export function pbkdf2Sync(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number) : Buffer;
     export function randomBytes(size: number): Buffer;
     export function randomBytes(size: number, callback: (err: Error, buf: Buffer) =>void ): void;
     export function pseudoRandomBytes(size: number): Buffer;
diff --git a/node/node-0.11.d.ts b/node/node-0.11.d.ts
index b05e53494e..e6943e2540 100644
--- a/node/node-0.11.d.ts
+++ b/node/node-0.11.d.ts
@@ -1099,8 +1099,8 @@ declare module "crypto" {
         setPrivateKey(public_key: string, encoding?: string): void;
     }
     export function getDiffieHellman(group_name: string): DiffieHellman;
-    export function pbkdf2(password: string, salt: string, iterations: number, keylen: number, callback: (err: Error, derivedKey: Buffer) => any): void;
-    export function pbkdf2Sync(password: string, salt: string, iterations: number, keylen: number) : Buffer;
+    export function pbkdf2(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, callback: (err: Error, derivedKey: Buffer) => any): void;
+    export function pbkdf2Sync(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number) : Buffer;
     export function randomBytes(size: number): Buffer;
     export function randomBytes(size: number, callback: (err: Error, buf: Buffer) =>void ): void;
     export function pseudoRandomBytes(size: number): Buffer;
diff --git a/node/node-0.12.d.ts b/node/node-0.12.d.ts
index 39f0aa37a9..08564c2247 100644
--- a/node/node-0.12.d.ts
+++ b/node/node-0.12.d.ts
@@ -1654,8 +1654,8 @@ declare module "crypto" {
         setPrivateKey(public_key: string, encoding?: string): void;
     }
     export function getDiffieHellman(group_name: string): DiffieHellman;
-    export function pbkdf2(password: string, salt: string, iterations: number, keylen: number, callback: (err: Error, derivedKey: Buffer) => any): void;
-    export function pbkdf2(password: string, salt: string, iterations: number, keylen: number, digest: string, callback: (err: Error, derivedKey: Buffer) => any): void;
+    export function pbkdf2(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, callback: (err: Error, derivedKey: Buffer) => any): void;
+    export function pbkdf2(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, digest: string, callback: (err: Error, derivedKey: Buffer) => any): void;
     export function pbkdf2Sync(password: string, salt: string, iterations: number, keylen: number) : Buffer;
     export function pbkdf2Sync(password: string, salt: string, iterations: number, keylen: number, digest: string) : Buffer;
     export function randomBytes(size: number): Buffer;
diff --git a/node/node-0.8.8.d.ts b/node/node-0.8.8.d.ts
index ea56c73064..592760360a 100644
--- a/node/node-0.8.8.d.ts
+++ b/node/node-0.8.8.d.ts
@@ -326,7 +326,7 @@ declare module "cluster" {
     export function disconnect(callback?: Function): void;
     export var workers: any;
 
-    // Event emitter    
+    // Event emitter
     export function addListener(event: string, listener: Function): void;
     export function on(event: string, listener: Function): any;
     export function once(event: string, listener: Function): void;
@@ -970,7 +970,7 @@ declare module "crypto" {
         setPrivateKey(public_key: string, encoding?: string): void;
     }
     export function getDiffieHellman(group_name: string): DiffieHellman;
-    export function pbkdf2(password: string, salt: string, iterations: number, keylen: number, callback: (err: Error, derivedKey: string) => any): void;
+    export function pbkdf2(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, callback: (err: Error, derivedKey: string) => any): void;
     export function randomBytes(size: number, callback?: (err: Error, buf: Buffer) =>void );
 }
 
diff --git a/node/node.d.ts b/node/node.d.ts
index c542c9ce8d..7fc456aba7 100644
--- a/node/node.d.ts
+++ b/node/node.d.ts
@@ -1727,10 +1727,10 @@ declare module "crypto" {
         setPrivateKey(public_key: string, encoding?: string): void;
     }
     export function getDiffieHellman(group_name: string): DiffieHellman;
-    export function pbkdf2(password: string, salt: string, iterations: number, keylen: number, callback: (err: Error, derivedKey: Buffer) => any): void;
-    export function pbkdf2(password: string, salt: string, iterations: number, keylen: number, digest: string, callback: (err: Error, derivedKey: Buffer) => any): void;
-    export function pbkdf2Sync(password: string, salt: string, iterations: number, keylen: number) : Buffer;
-    export function pbkdf2Sync(password: string, salt: string, iterations: number, keylen: number, digest: string) : Buffer;
+    export function pbkdf2(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, callback: (err: Error, derivedKey: Buffer) => any): void;
+    export function pbkdf2(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, digest: string, callback: (err: Error, derivedKey: Buffer) => any): void;
+    export function pbkdf2Sync(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number) : Buffer;
+    export function pbkdf2Sync(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, digest: string) : Buffer;
     export function randomBytes(size: number): Buffer;
     export function randomBytes(size: number, callback: (err: Error, buf: Buffer) =>void ): void;
     export function pseudoRandomBytes(size: number): Buffer;