diff --git a/CHANGELOG.md b/CHANGELOG.md
index 695e080..1b23c5a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 ## Version 1
+### Version 1.3.0
+**Security update!**
+* Add support for the Assert API (PR #51).
+  * New `:assertion` option in initialize opts. It takes either `:user` or `:bot`.
+  * New `override_assertion` parameter in `post` to prevent assertion errors being thrown.
+    * **Note**: Assertions will only happen if `post`'s `autoparse` parameter is true.
+  * New NotLoggedInError and NotBotError for the according assertions.
+  * `Butt#user_bot?` no longer has a parameter. It now queries with an assertion rather than checking the user's groups.
+  * New method `Butt#logged_in?` to check if the current instance is logged in.
+
 ### Version 1.2.0
 * Add support for the Purge API (#48)
 
diff --git a/mediawiki-butt.gemspec b/mediawiki-butt.gemspec
index a6e8b63..3653425 100644
--- a/mediawiki-butt.gemspec
+++ b/mediawiki-butt.gemspec
@@ -2,7 +2,7 @@ Gem::Specification.new do |s|
   s.authors = ['Eli Foster', 'Eric Schneider (xbony2)']
   s.name = 'mediawiki-butt'
   s.summary = 'Interacting with the MediaWiki API'
-  s.version = '1.2.0'
+  s.version = '1.3.0'
   s.license = 'MIT'
   # Expand on this description eventually.
   s.description = <<-EOF