diff --git a/OAuthCore.h b/OAuthCore.h
index b972be1..7690481 100644
--- a/OAuthCore.h
+++ b/OAuthCore.h
@@ -13,7 +13,8 @@ extern NSString *OAuthorizationHeader(NSURL *url,
 									  NSString *_oAuthConsumerKey, 
 									  NSString *_oAuthConsumerSecret, 
 									  NSString *_oAuthToken, 
-									  NSString *_oAuthTokenSecret);
+									  NSString *_oAuthTokenSecret,
+                                      NSString *_verifier);
 
 extern NSString *OAuthorizationHeaderWithCallback(NSURL *url,
 												  NSString *method,
@@ -22,4 +23,5 @@ extern NSString *OAuthorizationHeaderWithCallback(NSURL *url,
 												  NSString *_oAuthConsumerSecret,
 												  NSString *_oAuthToken,
 												  NSString *_oAuthTokenSecret,
+                                                  NSString *_verifier,
 												  NSString *_oAuthCallback);
diff --git a/OAuthCore.m b/OAuthCore.m
index b89015f..dcfc78e 100644
--- a/OAuthCore.m
+++ b/OAuthCore.m
@@ -27,11 +27,11 @@ static NSInteger SortParameter(NSString *key1, NSString *key2, void *context) {
 	return [NSData dataWithBytes:buf length:CC_SHA1_DIGEST_LENGTH];
 }
 
-NSString *OAuthorizationHeader(NSURL *url, NSString *method, NSData *body, NSString *_oAuthConsumerKey, NSString *_oAuthConsumerSecret, NSString *_oAuthToken, NSString *_oAuthTokenSecret) {
-	return OAuthorizationHeaderWithCallback(url, method, body, _oAuthConsumerKey, _oAuthConsumerSecret, _oAuthToken, _oAuthTokenSecret, nil);
+NSString *OAuthorizationHeader(NSURL *url, NSString *method, NSData *body, NSString *_oAuthConsumerKey, NSString *_oAuthConsumerSecret, NSString *_oAuthToken, NSString *_oAuthTokenSecret, NSString *_verifier) {
+	return OAuthorizationHeaderWithCallback(url, method, body, _oAuthConsumerKey, _oAuthConsumerSecret, _oAuthToken, _oAuthTokenSecret, _verifier, nil);
 }
 
-NSString *OAuthorizationHeaderWithCallback(NSURL *url, NSString *method, NSData *body, NSString *_oAuthConsumerKey, NSString *_oAuthConsumerSecret, NSString *_oAuthToken, NSString *_oAuthTokenSecret, NSString *_oAuthCallback) {
+NSString *OAuthorizationHeaderWithCallback(NSURL *url, NSString *method, NSData *body, NSString *_oAuthConsumerKey, NSString *_oAuthConsumerSecret, NSString *_oAuthToken, NSString *_oAuthTokenSecret, NSString *_verifier, NSString *_oAuthCallback) {
 	NSString *_oAuthNonce = [NSString ab_GUID];
 	NSString *_oAuthTimestamp = [NSString stringWithFormat:@"%d", (int)[[NSDate date] timeIntervalSince1970]];
 	NSString *_oAuthSignatureMethod = @"HMAC-SHA1";
@@ -47,6 +47,8 @@ static NSInteger SortParameter(NSString *key1, NSString *key2, void *context) {
 		[oAuthAuthorizationParameters setObject:_oAuthToken forKey:@"oauth_token"];
 	if (_oAuthCallback)
 		[oAuthAuthorizationParameters setObject:_oAuthCallback forKey:@"oauth_callback"];
+    if ( _verifier )
+        [oAuthAuthorizationParameters setObject:_verifier forKey:@"oauth_verifier"];
 
 	// get query and body parameters
 	NSDictionary *additionalQueryParameters = [NSURL ab_parseURLQueryString:[url query]];
diff --git a/OAuthCore.podspec b/OAuthCore.podspec
new file mode 100644
index 0000000..0e3c507
--- /dev/null
+++ b/OAuthCore.podspec
@@ -0,0 +1,16 @@
+Pod::Spec.new do |s|
+  s.name = "OAuthCore"
+  s.version = "0.0.1"
+  s.homepage = "https://github.com/atebits/OAuthCore"
+  s.summary = "<<-DESC
+               Simple function to sign OAuth requests. 
+               DESC"
+
+  s.authors = "Loren Brichter"
+  s.requires_arc = false
+  s.platform = :ios
+  s.license = "Copyright (C) 2012 Loren Brichter"
+  s.source = {:git => 'https://github.com/atebits/OAuthCore.git', :commit => "08727c23ae3ce27f9ec2c008d0bc1fbcc0ada20b"}
+  s.source_files = "OAuthCore.{h,m}", "OAuth+Additions.{h,m}"
+  s.dependency "NSData+Base64"
+end