diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ba760400..2c1869666 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
+## [5.4.1] - 2018-06-26 ##
+### Fixed
+- [PR #585](https://github.com/sendgrid/sendgrid-python/pull/585): Fix typo in `mail_example.py`. Big thanks to [Anurag Anand](https://github.com/theanuraganand) for the PR!
+- [PR #583](https://github.com/sendgrid/sendgrid-python/pull/585): Fix `Personalization.substitutions` setter. Trying to set substitutions directly rather than with add_substitution was causing an infinite regress. Big thanks to [Richard Nias](https://github.com/richardnias) for the PR!
+
 ## [5.4.0] - 2018-06-07 ##
 ### Added
 - [PR #384](https://github.com/sendgrid/sendgrid-python/pull/384): Adds how to set up domain whitelabel and how to view email statistics. Big thanks to [Aditya Tandon](https://github.com/adityatandon007) for the PR!
diff --git a/docker/README.md b/docker/README.md
index 4ff4e2afa..a523dc93d 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -1,5 +1,6 @@
 # Supported tags and respective `Dockerfile` links
- - `v5.4.0`, `latest` [(Dockerfile)](https://github.com/sendgrid/sendgrid-python/blob/master/docker/Dockerfile)
+ - `v5.4.1`, `latest` [(Dockerfile)](https://github.com/sendgrid/sendgrid-python/blob/master/docker/Dockerfile)
+ - `v5.4.0`
  - `v5.3.0`
  - `v5.2.1`
  - `v5.2.0`
diff --git a/register.py b/register.py
index b71341a34..0a7ffe8d8 100644
--- a/register.py
+++ b/register.py
@@ -2,8 +2,8 @@
 from io import open
 
 output = pypandoc.convert('README.md', 'rst')
-with open('README.txt' 'w+') as f:
-    f.write(str(output.encode('utf-8')))
+with open('README.txt', 'w+') as f:
+    f.write(output)
 
 readme_rst = open('./README.txt', 'r', encoding='utf-8').read()
 replace = '''
diff --git a/sendgrid/version.py b/sendgrid/version.py
index ec1b5ec64..c191754f8 100644
--- a/sendgrid/version.py
+++ b/sendgrid/version.py
@@ -1,2 +1,2 @@
-version_info = (5, 4, 0)
+version_info = (5, 4, 1)
 __version__ = '.'.join(str(v) for v in version_info)