diff --git a/Gemfile.lock b/Gemfile.lock
index 3ac5d4b54..e9dac4fc7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -280,4 +280,4 @@ DEPENDENCIES
   yard-activesupport-concern
 
 BUNDLED WITH
-   2.2.3
+   2.2.4
diff --git a/README.md b/README.md
index d465000dd..b75331d40 100644
--- a/README.md
+++ b/README.md
@@ -234,6 +234,8 @@ GoodJob.on_thread_error = -> (exception) { Raven.capture_exception(exception) }
 
 ### Dashboard
 
+![Dashboard UI](https://github.com/bensheldon/good_job/raw/main/SCREENSHOT.png)
+
 _🚧 GoodJob's dashboard is a work in progress. Please contribute ideas and code on [Github](https://github.com/bensheldon/good_job/issues)._
 
 GoodJob includes a Dashboard as a mountable `Rails::Engine`.
diff --git a/SCREENSHOT.png b/SCREENSHOT.png
new file mode 100644
index 000000000..bed2b3dac
Binary files /dev/null and b/SCREENSHOT.png differ
diff --git a/gemfiles/rails_5.2.gemfile.lock b/gemfiles/rails_5.2.gemfile.lock
index 37c641d38..a51d35988 100644
--- a/gemfiles/rails_5.2.gemfile.lock
+++ b/gemfiles/rails_5.2.gemfile.lock
@@ -328,4 +328,4 @@ DEPENDENCIES
   yard-activesupport-concern
 
 BUNDLED WITH
-   2.2.3
+   2.2.4
diff --git a/gemfiles/rails_6.0.gemfile.lock b/gemfiles/rails_6.0.gemfile.lock
index bfe756fc5..6b47c26be 100644
--- a/gemfiles/rails_6.0.gemfile.lock
+++ b/gemfiles/rails_6.0.gemfile.lock
@@ -343,4 +343,4 @@ DEPENDENCIES
   yard-activesupport-concern
 
 BUNDLED WITH
-   2.2.3
+   2.2.4
diff --git a/gemfiles/rails_6.1.gemfile.lock b/gemfiles/rails_6.1.gemfile.lock
index 56bc94316..b35879ca9 100644
--- a/gemfiles/rails_6.1.gemfile.lock
+++ b/gemfiles/rails_6.1.gemfile.lock
@@ -345,4 +345,4 @@ DEPENDENCIES
   yard-activesupport-concern
 
 BUNDLED WITH
-   2.2.3
+   2.2.4
diff --git a/gemfiles/rails_head.gemfile.lock b/gemfiles/rails_head.gemfile.lock
index b6aeb68c8..504fadede 100644
--- a/gemfiles/rails_head.gemfile.lock
+++ b/gemfiles/rails_head.gemfile.lock
@@ -351,4 +351,4 @@ DEPENDENCIES
   yard-activesupport-concern
 
 BUNDLED WITH
-   2.2.3
+   2.2.4
diff --git a/lib/good_job/configuration.rb b/lib/good_job/configuration.rb
index 330ba5bda..545a02451 100644
--- a/lib/good_job/configuration.rb
+++ b/lib/good_job/configuration.rb
@@ -101,6 +101,9 @@ def poll_interval
       ).to_i
     end
 
+    # Number of seconds to preserve jobs when using the +good_job cleanup_preserved_jobs+ CLI command.
+    # This configuration is only used when {GoodJob.preserve_job_records} is +true+.
+    # @return [Boolean]
     def cleanup_preserved_jobs_before_seconds_ago
       (
         options[:before_seconds_ago] ||
diff --git a/lib/good_job/notifier.rb b/lib/good_job/notifier.rb
index 1adf98cec..ac65f61e5 100644
--- a/lib/good_job/notifier.rb
+++ b/lib/good_job/notifier.rb
@@ -9,6 +9,7 @@ module GoodJob # :nodoc:
   # When a message is received, the notifier passes the message to each of its recipients.
   #
   class Notifier
+    # Raised if the Database adapter does not implement LISTEN.
     AdapterCannotListenError = Class.new(StandardError)
 
     # Default Postgres channel for LISTEN/NOTIFY
diff --git a/lib/good_job/poller.rb b/lib/good_job/poller.rb
index e3eeaf877..fe1b97150 100644
--- a/lib/good_job/poller.rb
+++ b/lib/good_job/poller.rb
@@ -19,6 +19,9 @@ class Poller
     #   @return [array<GoodJob:Poller>]
     cattr_reader :instances, default: [], instance_reader: false
 
+    # Creates GoodJob::Poller from a GoodJob::Configuration instance.
+    # @param configuration [GoodJob::Configuration]
+    # @return [GoodJob::Poller]
     def self.from_configuration(configuration)
       GoodJob::Poller.new(poll_interval: configuration.poll_interval)
     end
diff --git a/spec/test_app/db/schema.rb b/spec/test_app/db/schema.rb
index 45b4f2d3c..d08e6213f 100644
--- a/spec/test_app/db/schema.rb
+++ b/spec/test_app/db/schema.rb
@@ -2,8 +2,8 @@
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
 #
-# This file is the source Rails uses to define your schema when running `rails
-# db:schema:load`. When creating a new database, `rails db:schema:load` tends to
+# This file is the source Rails uses to define your schema when running `bin/rails
+# db:schema:load`. When creating a new database, `bin/rails db:schema:load` tends to
 # be faster and is potentially less error prone than running all of your
 # migrations from scratch. Old migrations may fail to apply correctly if those
 # migrations use external dependencies or application code.