diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e93c05e5..0b8039ca5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,12 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
+## [1.5.18] - 2015-11-17 ##
+
+### Fixed ###
+
+- Fix "HTTP 406 Not Acceptable Errors" [149](https://github.com/sendgrid/sendgrid-python/issues/149)
+
 ## [1.5.17] - 2015-11-17 ##
 
 ### Added ###
diff --git a/sendgrid/version.py b/sendgrid/version.py
index 4994552db..2354f1816 100644
--- a/sendgrid/version.py
+++ b/sendgrid/version.py
@@ -1,2 +1,2 @@
-version_info = (1, 5, 17)
+version_info = (1, 5, 18)
 __version__ = '.'.join(str(v) for v in version_info)