diff --git a/README.md b/README.md
index 5532345bd..c0d01f5d3 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 [![APACHE v2 License](https://img.shields.io/badge/license-apachev2-blue.svg?style=flat)](LICENSE-2.0.txt) 
 [![Latest Release](https://img.shields.io/maven-central/v/org.simplejavamail/simple-java-mail.svg?style=flat)](https://search.maven.org/#search%7Cgav%7C1%7Cg%3A%22org.simplejavamail%22%20AND%20a%3A%22simple-java-mail%22) 
-[![Javadocs](https://img.shields.io/badge/javadoc-5.5.0-brightgreen.svg?color=brightgreen)](https://www.javadoc.io/doc/org.simplejavamail/simple-java-mail) 
+[![Javadocs](https://img.shields.io/badge/javadoc-5.5.1-brightgreen.svg?color=brightgreen)](https://www.javadoc.io/doc/org.simplejavamail/simple-java-mail) 
 [![Build Status](https://img.shields.io/travis/bbottema/simple-java-mail.svg?style=flat)](https://travis-ci.org/bbottema/simple-java-mail) 
 [![Codacy](https://img.shields.io/codacy/9f142ca8c8c640c984835a8ae02d29f3.svg?style=flat)](https://www.codacy.com/app/b-bottema/simple-java-mail)
 [![Paypal Donate](https://img.shields.io/badge/donate%20with-paypal-blue.svg?style=flat)](https://paypal.me/bennybottema)
@@ -69,17 +69,18 @@ Simple Java Mail is available in [Maven Central](https://search.maven.org/#searc
 <dependency>
     <groupId>org.simplejavamail</groupId>
     <artifactId>simple-java-mail</artifactId>
-    <version>5.5.0</version>
+    <version>5.5.1</version>
 </dependency>
 ```
 
 ### Latest Progress ###
 
-[v5.5.0](https://search.maven.org/#artifactdetails%7Corg.simplejavamail%7Csimple-java-mail%7C5.5.0%7Cjar) (15-October-2019)
+v5.5.0 - [v5.5.1](https://search.maven.org/#artifactdetails%7Corg.simplejavamail%7Csimple-java-mail%7C5.5.1%7Cjar)
 
-- [#229](https://github.com/bbottema/simple-java-mail/issues/229) Bugfix: Timeouts not working for synchronous sendMail calls.
+- v5.5.1 (20-October-2019): [#230](https://github.com/bbottema/simple-java-mail/issues/230) Bugfix: Missing address value in address headers (ie. Return-Path) not handled properly, resulting in Exception
+- v5.5.0 (15-October-2019): [#229](https://github.com/bbottema/simple-java-mail/issues/229) Bugfix: Timeouts not working for synchronous sendMail calls.
 
-If you had connection properties configured for non-async send jobs, only now they will actually start to take effect.
+ If you had connection properties configured for non-async send jobs, only now they will actually start to take effect.
 
 
 [v5.4.0](https://search.maven.org/#artifactdetails%7Corg.simplejavamail%7Csimple-java-mail%7C5.4.0%7Cjar) (28-August-2019)
diff --git a/RELEASE.txt b/RELEASE.txt
index 59f3c5bb5..254e1a558 100644
--- a/RELEASE.txt
+++ b/RELEASE.txt
@@ -3,14 +3,15 @@ http://www.simplejavamail.org
 <dependency>
     <groupId>org.simplejavamail</groupId>
     <artifactId>simple-java-mail</artifactId>
-    <version>5.5.0</version>
+    <version>5.5.1</version>
 </dependency>
 
-v5.5.0 (15-October-2019)
+v5.5.0 - [v5.5.1](https://search.maven.org/#artifactdetails%7Corg.simplejavamail%7Csimple-java-mail%7C5.5.1%7Cjar)
 
-- 229: Bugfix: Timeouts not working for synchronous sendMail calls.
+- v5.5.1 (20-October-2019): #230: Bugfix: Missing address value in address headers (ie. Return-Path) not handled properly, resulting in Exception
+- v5.5.0 (15-October-2019): #229: Bugfix: Timeouts not working for synchronous sendMail calls.
 
-If you had connection properties configured for non-async send jobs, only now they will actually start to take effect.
+ If you had connection properties configured for non-async send jobs, only now they will actually start to take effect.
 
 
 v5.4.0 (28-August-2019)
diff --git a/pom.xml b/pom.xml
index 95a1d7703..d8e80bd0e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
     <artifactId>simple-java-mail</artifactId>
     <packaging>jar</packaging>
     <name>Simple Java Mail</name>
-    <version>5.5.0</version>
+    <version>5.5.1</version>
     <description>Simple API, Complex Emails. A light weight wrapper for the JavaMail SMTP API</description>
     <url>http://http://www.simplejavamail.org/</url>