diff --git a/Gemfile b/Gemfile
index 6a063649..adac3ae9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,17 +5,17 @@ gem "rake"
 group :test do
   platforms :jruby do
     gem "activerecord-jdbcmysql-adapter"
-    gem "activerecord-jdbcpostgresql-adapter"
+    # gem "activerecord-jdbcpostgresql-adapter"
     gem "activerecord-jdbcsqlite3-adapter"
   end
 
   platforms :ruby, :mswin, :mingw do
     gem "mysql2", "~> 0.4.5"
-    gem "pg", "~> 0.18"
+    # gem "pg"
     gem "sqlite3"
   end
 
-  gem "coveralls", require: false
+  # gem "coveralls", require: false
   gem "rspec", ">= 3"
   gem "rubocop"
   gem "rubocop-rspec"
diff --git a/Gemfile.lock b/Gemfile.lock
index 7e31d08d..8b67b24f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,105 +2,101 @@ PATH
   remote: .
   specs:
     delayed_job_active_record (4.1.3)
-      activerecord (>= 3.0, < 6.1)
+      activerecord (>= 3.0, < 6.2)
       delayed_job (>= 3.0, < 5)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (5.2.4.1)
-      activesupport (= 5.2.4.1)
-    activerecord (5.2.4.1)
-      activemodel (= 5.2.4.1)
-      activesupport (= 5.2.4.1)
-      arel (>= 9.0)
-    activesupport (5.2.4.1)
+    activemodel (6.1.7.4)
+      activesupport (= 6.1.7.4)
+    activerecord (6.1.7.4)
+      activemodel (= 6.1.7.4)
+      activesupport (= 6.1.7.4)
+    activesupport (6.1.7.4)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-    arel (9.0.0)
-    ast (2.4.0)
-    concurrent-ruby (1.1.6)
-    coveralls (0.7.2)
-      multi_json (~> 1.3)
-      rest-client (= 1.6.7)
-      simplecov (>= 0.7)
-      term-ansicolor (= 1.2.2)
-      thor (= 0.18.1)
-    delayed_job (4.1.8)
-      activesupport (>= 3.0, < 6.1)
-    diff-lcs (1.3)
-    docile (1.3.2)
-    i18n (1.8.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
+    ast (2.4.2)
+    concurrent-ruby (1.2.2)
+    delayed_job (4.1.11)
+      activesupport (>= 3.0, < 8.0)
+    diff-lcs (1.5.0)
+    docile (1.4.0)
+    i18n (1.14.1)
       concurrent-ruby (~> 1.0)
-    jaro_winkler (1.5.4)
-    json (2.3.0)
-    mime-types (3.3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2019.1009)
-    minitest (5.14.0)
-    multi_json (1.14.1)
+    json (2.6.3)
+    language_server-protocol (3.17.0.3)
+    mini_portile2 (2.8.4)
+    minitest (5.18.1)
     mysql2 (0.4.10)
-    parallel (1.19.1)
-    parser (2.7.0.4)
-      ast (~> 2.4.0)
-    pg (0.21.0)
-    rainbow (3.0.0)
-    rake (13.0.1)
-    rest-client (1.6.7)
-      mime-types (>= 1.16)
-    rexml (3.2.4)
-    rspec (3.9.0)
-      rspec-core (~> 3.9.0)
-      rspec-expectations (~> 3.9.0)
-      rspec-mocks (~> 3.9.0)
-    rspec-core (3.9.1)
-      rspec-support (~> 3.9.1)
-    rspec-expectations (3.9.1)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
+    racc (1.7.1)
+    rainbow (3.1.1)
+    rake (13.0.6)
+    regexp_parser (2.8.1)
+    rexml (3.2.5)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
-    rspec-mocks (3.9.1)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
-    rspec-support (3.9.2)
-    rubocop (0.80.1)
-      jaro_winkler (~> 1.5.1)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rubocop (1.54.2)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 2.7.0.1)
+      parser (>= 3.2.2.3)
       rainbow (>= 2.2.2, < 4.0)
-      rexml
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.28.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 1.7)
-    rubocop-rspec (1.38.1)
-      rubocop (>= 0.68.1)
-    ruby-progressbar (1.10.1)
-    simplecov (0.17.1)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-capybara (2.18.0)
+      rubocop (~> 1.41)
+    rubocop-factory_bot (2.23.1)
+      rubocop (~> 1.33)
+    rubocop-rspec (2.22.0)
+      rubocop (~> 1.33)
+      rubocop-capybara (~> 2.17)
+      rubocop-factory_bot (~> 2.22)
+    ruby-progressbar (1.13.0)
+    simplecov (0.22.0)
       docile (~> 1.1)
-      json (>= 1.8, < 3)
-      simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.2)
-    sqlite3 (1.4.2)
-    term-ansicolor (1.2.2)
-      tins (~> 0.8)
-    thor (0.18.1)
-    thread_safe (0.3.6)
-    tins (0.13.2)
-    tzinfo (1.2.6)
-      thread_safe (~> 0.1)
-    unicode-display_width (1.6.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
+    sqlite3 (1.6.3)
+      mini_portile2 (~> 2.8.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    unicode-display_width (2.4.2)
+    zeitwerk (2.6.8)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   activerecord-jdbcmysql-adapter
-  activerecord-jdbcpostgresql-adapter
   activerecord-jdbcsqlite3-adapter
-  coveralls
   delayed_job_active_record!
   mysql2 (~> 0.4.5)
-  pg (~> 0.18)
   rake
   rspec (>= 3)
   rubocop
diff --git a/delayed_job_active_record.gemspec b/delayed_job_active_record.gemspec
index ebbcfee7..d3824a77 100644
--- a/delayed_job_active_record.gemspec
+++ b/delayed_job_active_record.gemspec
@@ -1,5 +1,5 @@
 Gem::Specification.new do |spec|
-  spec.add_dependency "activerecord", [">= 3.0", "< 6.1"]
+  spec.add_dependency "activerecord", [">= 3.0", "< 6.2"]
   spec.add_dependency "delayed_job",  [">= 3.0", "< 5"]
   spec.authors        = ["Brian Ryckbost", "Matt Griffin", "Erik Michaels-Ober"]
   spec.description    = "ActiveRecord backend for Delayed::Job, originally authored by Tobias Lütke"
@@ -11,4 +11,5 @@ Gem::Specification.new do |spec|
   spec.require_paths  = ["lib"]
   spec.summary        = "ActiveRecord backend for DelayedJob"
   spec.version        = "4.1.3"
+  spec.metadata       = { "github_repo" => "ssh://github.com/HealthTap/delayed_job_active_record" }
 end
diff --git a/lib/delayed/backend/active_record/abstract_job.rb b/lib/delayed/backend/active_record/abstract_job.rb
new file mode 100644
index 00000000..26de12a4
--- /dev/null
+++ b/lib/delayed/backend/active_record/abstract_job.rb
@@ -0,0 +1,3 @@
+class Delayed::Backend::ActiveRecord::AbstractJob < ::ActiveRecord::Base
+  self.abstract_class = true
+end
diff --git a/lib/delayed/backend/active_record/archived_job.rb b/lib/delayed/backend/active_record/archived_job.rb
index 9887ffdb..f0387f42 100644
--- a/lib/delayed/backend/active_record/archived_job.rb
+++ b/lib/delayed/backend/active_record/archived_job.rb
@@ -1,4 +1,4 @@
-class Delayed::Backend::ActiveRecord::ArchivedJob < ::ActiveRecord::Base
+class Delayed::Backend::ActiveRecord::ArchivedJob < Delayed::Backend::ActiveRecord::AbstractJob
   #attr_accessible :priority, :run_at, :queue, :payload_object, :failed_at, :locked_at, :locked_by,
   #                :delayed_object_type, :delayed_object_id, :method_name, :args, :unique_digest,
   #                :attempts, :handler, :last_error
diff --git a/lib/delayed/backend/active_record/ht_delayed_job.rb b/lib/delayed/backend/active_record/ht_delayed_job.rb
index 02716c93..9dc32a93 100644
--- a/lib/delayed/backend/active_record/ht_delayed_job.rb
+++ b/lib/delayed/backend/active_record/ht_delayed_job.rb
@@ -1,7 +1,7 @@
 module Delayed
   module Backend
     module ActiveRecord
-      class HtDelayedJob < ::ActiveRecord::Base
+      class HtDelayedJob < Delayed::Backend::ActiveRecord::AbstractJob
         include Delayed::Backend::HtExtension
 
         #attr_accessible :priority, :run_at, :queue, :payload_object,
diff --git a/lib/delayed/backend/active_record/old_job.rb b/lib/delayed/backend/active_record/old_job.rb
index b5356de5..640cb384 100644
--- a/lib/delayed/backend/active_record/old_job.rb
+++ b/lib/delayed/backend/active_record/old_job.rb
@@ -1,3 +1,3 @@
-class Delayed::Backend::ActiveRecord::OldJob < ::ActiveRecord::Base
+class Delayed::Backend::ActiveRecord::OldJob < Delayed::Backend::ActiveRecord::AbstractJob
   self.table_name = 'delayed_jobs'
 end
diff --git a/lib/delayed/backend/ht_extension.rb b/lib/delayed/backend/ht_extension.rb
index 45bbdbb8..5ae57402 100644
--- a/lib/delayed/backend/ht_extension.rb
+++ b/lib/delayed/backend/ht_extension.rb
@@ -94,7 +94,7 @@ def archive
           begin
             tries ||= 3
             self.destroy
-          rescue ActiveRecord::Deadlocked
+          rescue ::ActiveRecord::Deadlocked
             retry unless (tries -= 1).zero?
           end
         end
diff --git a/lib/delayed_job_active_record.rb b/lib/delayed_job_active_record.rb
index cfb888bd..828cd0da 100644
--- a/lib/delayed_job_active_record.rb
+++ b/lib/delayed_job_active_record.rb
@@ -1,6 +1,7 @@
 require 'active_record'
 require 'delayed_job'
 require 'delayed/backend/active_record'
+require 'delayed/backend/active_record/abstract_job'
 require 'delayed/backend/active_record/archived_job'
 require 'delayed/backend/active_record/old_job'
 require 'delayed/backend/active_record/ht_delayed_job'