diff --git a/Apptentive/Apptentive/Apptentive.h b/Apptentive/Apptentive/Apptentive.h
index c56e977e3..0356fc70d 100644
--- a/Apptentive/Apptentive/Apptentive.h
+++ b/Apptentive/Apptentive/Apptentive.h
@@ -17,7 +17,7 @@ FOUNDATION_EXPORT double ApptentiveVersionNumber;
 FOUNDATION_EXPORT const unsigned char ApptentiveVersionString[];
 
 /** The version number of the Apptentive SDK. */
-#define kApptentiveVersionString @"4.0.0"
+#define kApptentiveVersionString @"4.0.1"
 
 /** The platform that the SDK is built for. */
 #define kApptentivePlatformString @"iOS"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5d3124c00..ef539aa21 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+2017-07-28 frankus, weeebox v4.0.1
+----------------------------------
+Version 4.0.1 fixes a bug where a small number of legacy SDK installations could be incorrectly migrated and could cause the SDK to get stuck in an invalid state. It also corrects a bug where JWTs were not deleted on logout (they would still be revoked on the server).
+
 2017-07-18 frankus, weeebox v4.0.0
 ----------------------------------
 Version 4.0.0 adds the ability to pass customer authentication to Apptentive to protect and separate each customer's personal information from one another. It uses a new method for initializing the SDK. There is also a new method (required for using push) to forward local notifications to the SDK. Static library support has been dropped in favor of a dynamic framework. There is a new runtime setting for log level, which defaults to `INFO` in all build configurations. 
diff --git a/apptentive-ios.podspec b/apptentive-ios.podspec
index a8a59c0b9..c77c0de92 100644
--- a/apptentive-ios.podspec
+++ b/apptentive-ios.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
   s.name     = 'apptentive-ios'
   s.module_name = 'Apptentive'
-  s.version  = '4.0.0'
+  s.version  = '4.0.1'
   s.license  = 'BSD'
   s.summary  = 'Apptentive Customer Communications SDK.'
   s.homepage = 'https://www.apptentive.com/'