diff --git a/CHANGELOG.md b/CHANGELOG.md
index 14a4a71f7..51e2dcf0e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,33 +1,34 @@
-4.1.9 - not yet released
-=================
+4.1.9 - 2020-12-09
+==================
 * Support for Rails 6.1
+* Add support for parameterized mailers via delay call (#1121)
 
 4.1.8 - 2019-08-16
-=================
+==================
 * Support for Rails 6.0.0
 
 4.1.7 - 2019-06-20
-=================
+==================
 * Fix loading Delayed::PerformableMailer when ActionMailer isn't loaded yet
 
 4.1.6 - 2019-06-19
-=================
+==================
 * Properly initialize ActionMailer outside railties (#1077)
 * Fix Psych load_tags support (#1093)
 * Replace REMOVED with FAILED in log message (#1048)
 * Misc doc updates (#1052, #1074, #1064, #1063)
 
 4.1.5 - 2018-04-13
-=================
+==================
 * Allow Rails 5.2
 
 4.1.4 - 2017-12-29
-=================
+==================
 * Use `yaml_tag` instead of deprecated `yaml_as` (#996)
 * Support ruby 2.5.0
 
 4.1.3 - 2017-05-26
-=================
+==================
 * Don't mutate the options hash (#877)
 * Log an error message when a deserialization error occurs (#894)
 * Adding the queue name to the log output (#917)
diff --git a/README.md b/README.md
index ded92378c..29ad10782 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 **If you're viewing this at https://github.com/collectiveidea/delayed_job,
 you're reading the documentation for the master branch.
 [View documentation for the latest release
-(4.1.8).](https://github.com/collectiveidea/delayed_job/tree/v4.1.8)**
+(4.1.9).](https://github.com/collectiveidea/delayed_job/tree/v4.1.9)**
 
 Delayed::Job
 ============
@@ -182,7 +182,7 @@ Notifier.delay.signup(@user)
 # delayed_job running at a specific time
 Notifier.delay(run_at: 5.minutes.from_now).signup(@user)
 
-# when using parameters, the .with method must be called before the .delay method 
+# when using parameters, the .with method must be called before the .delay method
 Notifier.with(foo: 1, bar: 2).delay.signup(@user)
 ```
 
diff --git a/delayed_job.gemspec b/delayed_job.gemspec
index 047125511..c9b60a781 100644
--- a/delayed_job.gemspec
+++ b/delayed_job.gemspec
@@ -13,7 +13,7 @@ Gem::Specification.new do |spec|
   spec.require_paths  = ['lib']
   spec.summary        = 'Database-backed asynchronous priority queue system -- Extracted from Shopify'
   spec.test_files     = Dir.glob('spec/**/*')
-  spec.version        = '4.1.8'
+  spec.version        = '4.1.9'
   spec.metadata       = {
     'changelog_uri'   => 'https://github.com/collectiveidea/delayed_job/blob/master/CHANGELOG.md',
     'bug_tracker_uri' => 'https://github.com/collectiveidea/delayed_job/issues',