diff --git a/CardIO.podspec b/CardIO.podspec
index ba5bad4..a6a99d5 100644
--- a/CardIO.podspec
+++ b/CardIO.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |spec|
   spec.name             = 'CardIO'
-  spec.version          = '5.0.6'
+  spec.version          = '5.1.0'
   spec.license          = { type: 'MIT', file: 'LICENSE.md' }
   spec.homepage         = 'https://www.card.io'
   spec.authors          = { 'CardIO' => 'support@paypal.com' }
diff --git a/CardIO/CardIO.h b/CardIO/CardIO.h
index 6ded97a..1f50967 100644
--- a/CardIO/CardIO.h
+++ b/CardIO/CardIO.h
@@ -1,6 +1,6 @@
 //
 //  CardIO.h
-//  Version 5.0.6
+//  Version 5.1.0
 //
 //  See the file "LICENSE.md" for the full license governing this code.
 //
diff --git a/CardIO/CardIOCreditCardInfo.h b/CardIO/CardIOCreditCardInfo.h
index 4d70c73..0183e67 100644
--- a/CardIO/CardIOCreditCardInfo.h
+++ b/CardIO/CardIOCreditCardInfo.h
@@ -1,6 +1,6 @@
 //
 //  CardIOCreditCardInfo.h
-//  Version 5.0.6
+//  Version 5.1.0
 //
 //  See the file "LICENSE.md" for the full license governing this code.
 //
diff --git a/CardIO/CardIODetectionMode.h b/CardIO/CardIODetectionMode.h
index be7cf23..72e1a30 100644
--- a/CardIO/CardIODetectionMode.h
+++ b/CardIO/CardIODetectionMode.h
@@ -1,6 +1,6 @@
 //
 //  CardIODetectionMode.h
-//  Version 5.0.6
+//  Version 5.1.0
 //
 //  See the file "LICENSE.md" for the full license governing this code.
 //
diff --git a/CardIO/CardIOPaymentViewController.h b/CardIO/CardIOPaymentViewController.h
index f571a79..c1af1dc 100644
--- a/CardIO/CardIOPaymentViewController.h
+++ b/CardIO/CardIOPaymentViewController.h
@@ -1,6 +1,6 @@
 //
 //  CardIOPaymentViewController.h
-//  Version 5.0.6
+//  Version 5.1.0
 //
 //  See the file "LICENSE.md" for the full license governing this code.
 //
@@ -78,6 +78,13 @@
 /// Defaults to NO.
 @property(nonatomic, assign, readwrite) BOOL suppressScannedCardImage;
 
+/// After a successful scan, card.io will display an image of the card with
+/// the computed card number superimposed. This property controls how long (in seconds)
+/// that image will be displayed.
+/// Set this to 0.0 to suppress the display entirely.
+/// Defaults to 0.1.
+@property(nonatomic, assign, readwrite) CGFloat scannedImageDuration;
+
 /// Mask the card number digits as they are manually entered by the user. Defaults to NO.
 @property(nonatomic, assign, readwrite) BOOL maskManualEntryDigits;
 
diff --git a/CardIO/CardIOPaymentViewControllerDelegate.h b/CardIO/CardIOPaymentViewControllerDelegate.h
index 71dd655..ff3763d 100644
--- a/CardIO/CardIOPaymentViewControllerDelegate.h
+++ b/CardIO/CardIOPaymentViewControllerDelegate.h
@@ -1,6 +1,6 @@
 //
 //  CardIOPaymentViewControllerDelegate.h
-//  Version 5.0.6
+//  Version 5.1.0
 //
 //  See the file "LICENSE.md" for the full license governing this code.
 //
diff --git a/CardIO/CardIOUtilities.h b/CardIO/CardIOUtilities.h
index db43d43..a3a88b1 100644
--- a/CardIO/CardIOUtilities.h
+++ b/CardIO/CardIOUtilities.h
@@ -1,6 +1,6 @@
 //
 //  CardIOUtilities.h
-//  Version 5.0.6
+//  Version 5.1.0
 //
 //  See the file "LICENSE.md" for the full license governing this code.
 //
diff --git a/CardIO/CardIOView.h b/CardIO/CardIOView.h
index 9ea2d31..a0f55d6 100644
--- a/CardIO/CardIOView.h
+++ b/CardIO/CardIOView.h
@@ -1,6 +1,6 @@
 //
 //  CardIOView.h
-//  Version 5.0.6
+//  Version 5.1.0
 //
 //  See the file "LICENSE.md" for the full license governing this code.
 //
diff --git a/CardIO/CardIOViewDelegate.h b/CardIO/CardIOViewDelegate.h
index 6cf983e..c030c08 100644
--- a/CardIO/CardIOViewDelegate.h
+++ b/CardIO/CardIOViewDelegate.h
@@ -1,6 +1,6 @@
 //
 //  CardIOViewDelegate.h
-//  Version 5.0.6
+//  Version 5.1.0
 //
 //  See the file "LICENSE.md" for the full license governing this code.
 //
diff --git a/CardIO/libCardIO.a b/CardIO/libCardIO.a
index 871dd2a..82ff9e4 100644
Binary files a/CardIO/libCardIO.a and b/CardIO/libCardIO.a differ
diff --git a/README.md b/README.md
index 80e5e07..16df45b 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,7 @@ The card.io iOS SDK includes header files and a single static library. We'll wal
 
 ### Requirements
 
+*   The latest non-beta version of Xcode. (Older or newer versions *might* also work.)
 *   Supports target deployment of iOS version 6.1+ and instruction set armv7+ (including 64-bit).
 
 ### Setup
@@ -77,7 +78,7 @@ pod 'CardIO'
      * QuartzCore
      * Security
      * UIKit
-5. *or,* if you are using Xcode 5 or newer:
+5. *or:*
   * Add only these frameworks to your project  (as `Optional` [i.e., weak-linked] libraries):
     * AVFoundation
     * AudioToolbox
diff --git a/release_notes.txt b/release_notes.txt
index d8fc66a..6c47ca8 100644
--- a/release_notes.txt
+++ b/release_notes.txt
@@ -1,9 +1,21 @@
 card.io iOS SDK release notes
 =============================
 
+5.1.0 (Sun 7/12/2015)
+
+* Update project and sample apps for Xcode 6.4.
+* Expose `scannedImageDuration` in CardIOPaymentViewController.
+    (https://github.com/card-io/card.io-iOS-source/pull/29)
+* Better respect UISupportedInterfaceOrientation from the app plist.
+    (https://github.com/card-io/card.io-iOS-SDK/issues/117)
+* Fix iOS 9 crash by removing some obsolete localization code.
+    (https://github.com/card-io/card.io-iOS-SDK/issues/120)
+
+--
+
 5.0.6 (Thu 5/21/2015)
 
-* Prevent crash when user simultaneously taps `Cancel` and `Enter Manually` buttons
+* Prevent crash when user simultaneously taps `Cancel` and `Enter Manually` buttons.
     (https://github.com/card-io/card.io-iOS-SDK/issues/112)
 
 --