diff --git a/.gitignore b/.gitignore
index 708260f..035b384 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,6 +10,4 @@
 # rspec failure tracking
 .rspec_status
 
-Gemfile.lock
-
 log
diff --git a/.travis.yml b/.travis.yml
index 36ba317..4d695eb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,25 +1,52 @@
 language: ruby
-matrix:
+
+os: linux
+dist: xenial
+
+jobs:
   fast_finish: true
   include:
-  - rvm: 2.4
   - rvm: 2.5
   - rvm: 2.6
+  - rvm: 2.7
   - rvm: ruby-head
   allow_failures:
   - rvm: ruby-head
-sudo: false
-cache: bundler
+
 services:
 - postgresql
+
 addons:
-  postgresql: 9.6
-before_install: gem install bundler
+  postgresql: 12
+  apt:
+    packages:
+    - postgresql-12
+    - postgresql-client-12
+    - postgresql-server-dev-12
+    - postgresql-client-common
+    - postgresql-common
+
+env:
+  global:
+  - PGPORT=5433
+
+cache: bundler
+
+before_install:
+- gem install bundler
+- sudo cp /etc/postgresql/9.6/main/pg_hba.conf /etc/postgresql/12/main/pg_hba.conf
+- sudo service postgresql restart 12
+- sleep 1
+
+install: bundle install --jobs=3 --retry=3 --path=${BUNDLE_PATH:-vendor/bundle}
+
 before_script:
 - psql -c 'create database sequel_plugins;' -U postgres
+
 script:
 - bundle exec rspec
 - bundle exec rubocop
+
 deploy:
   provider: rubygems
   api_key:
@@ -28,3 +55,4 @@ deploy:
   on:
     repo: umbrellio/umbrellio-sequel-plugins
     branch: master
+    rvm: 2.7
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..deb4cf6
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,117 @@
+PATH
+  remote: .
+  specs:
+    umbrellio-sequel-plugins (0.4.0)
+      sequel
+      symbiont-ruby (>= 0.6)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    activesupport (6.0.2.2)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+      zeitwerk (~> 2.2)
+    ast (2.4.0)
+    coderay (1.1.2)
+    concurrent-ruby (1.1.6)
+    coveralls (0.8.23)
+      json (>= 1.8, < 3)
+      simplecov (~> 0.16.1)
+      term-ansicolor (~> 1.3)
+      thor (>= 0.19.4, < 2.0)
+      tins (~> 1.6)
+    diff-lcs (1.3)
+    docile (1.3.2)
+    i18n (1.8.2)
+      concurrent-ruby (~> 1.0)
+    jaro_winkler (1.5.4)
+    json (2.3.0)
+    method_source (1.0.0)
+    minitest (5.14.0)
+    money (6.13.7)
+      i18n (>= 0.6.4, <= 2)
+    parallel (1.19.1)
+    parser (2.7.1.0)
+      ast (~> 2.4.0)
+    pg (1.2.3)
+    pry (0.13.0)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    rack (2.2.2)
+    rainbow (3.0.0)
+    rake (13.0.1)
+    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)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.9.0)
+    rspec-mocks (3.9.1)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.9.0)
+    rspec-support (3.9.2)
+    rubocop (0.81.0)
+      jaro_winkler (~> 1.5.1)
+      parallel (~> 1.10)
+      parser (>= 2.7.0.1)
+      rainbow (>= 2.2.2, < 4.0)
+      rexml
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 2.0)
+    rubocop-config-umbrellio (0.81.0.78)
+      rubocop (= 0.81.0)
+      rubocop-performance (= 1.5.2)
+      rubocop-rails (= 2.5.0)
+      rubocop-rspec (= 1.38.1)
+    rubocop-performance (1.5.2)
+      rubocop (>= 0.71.0)
+    rubocop-rails (2.5.0)
+      activesupport
+      rack (>= 1.1)
+      rubocop (>= 0.72.0)
+    rubocop-rspec (1.38.1)
+      rubocop (>= 0.68.1)
+    ruby-progressbar (1.10.1)
+    sequel (5.31.0)
+    simplecov (0.16.1)
+      docile (~> 1.1)
+      json (>= 1.8, < 3)
+      simplecov-html (~> 0.10.0)
+    simplecov-html (0.10.2)
+    symbiont-ruby (0.6.0)
+    sync (0.5.0)
+    term-ansicolor (1.7.1)
+      tins (~> 1.0)
+    thor (1.0.1)
+    thread_safe (0.3.6)
+    tins (1.24.1)
+      sync
+    tzinfo (1.2.7)
+      thread_safe (~> 0.1)
+    unicode-display_width (1.7.0)
+    zeitwerk (2.3.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  bundler
+  coveralls (>= 0.8)
+  money
+  pg
+  pry
+  rake
+  rspec
+  rubocop-config-umbrellio
+  simplecov
+  umbrellio-sequel-plugins!
+
+BUNDLED WITH
+   2.1.4
diff --git a/lib/sequel/plugins/money_accessors.rb b/lib/sequel/plugins/money_accessors.rb
index 50cac7c..b2c3d7e 100644
--- a/lib/sequel/plugins/money_accessors.rb
+++ b/lib/sequel/plugins/money_accessors.rb
@@ -2,6 +2,8 @@
 
 require "money"
 
+Money.rounding_mode = BigDecimal::ROUND_HALF_UP
+
 # Creates accessors for money values
 module Sequel::Plugins::MoneyAccessors
   MoneyClassRequired = Class.new(StandardError)
diff --git a/lib/sequel/plugins/upsert.rb b/lib/sequel/plugins/upsert.rb
index 441d60b..1069ff1 100644
--- a/lib/sequel/plugins/upsert.rb
+++ b/lib/sequel/plugins/upsert.rb
@@ -39,7 +39,7 @@ def upsert(row, **options)
     # @see #upsert_dataset
     def multi_upsert(rows, **options)
       rows = rows.map { |row| sequel_values(row) }
-      upsert_dataset(options).multi_insert(rows)
+      upsert_dataset(**options).multi_insert(rows)
     end
 
     # Returns formatted row values
diff --git a/spec/extensions/currency_rates_spec.rb b/spec/extensions/currency_rates_spec.rb
index 36bde3d..d700a90 100644
--- a/spec/extensions/currency_rates_spec.rb
+++ b/spec/extensions/currency_rates_spec.rb
@@ -32,10 +32,10 @@
 
 RSpec.describe "currency_rates" do
   let(:items) do
-    DB[:items].with_rates(*args).select(Sequel[:price].in_usd.as(:price)).order(:price)
+    DB[:items].with_rates(**options).select(Sequel[:price].in_usd.as(:price)).order(:price)
   end
 
-  let(:args) { [] }
+  let(:options) { Hash[] }
 
   specify do
     expect(items.first).to eq(price: 15)
@@ -43,7 +43,7 @@
   end
 
   context "with symbol in time_column param" do
-    let(:args) { [time_column: :updated_at] }
+    let(:options) { Hash[time_column: :updated_at] }
 
     specify do
       expect(items.first).to eq(price: 15)
@@ -52,7 +52,7 @@
   end
 
   context "with expression in time_column param" do
-    let(:args) { [time_column: Sequel[:items][:updated_at]] }
+    let(:options) { Hash[time_column: Sequel[:items][:updated_at]] }
 
     specify do
       expect(items.first).to eq(price: 15)
diff --git a/spec/plugins/with_lock_spec.rb b/spec/plugins/with_lock_spec.rb
index 0d37cfb..56b6e54 100644
--- a/spec/plugins/with_lock_spec.rb
+++ b/spec/plugins/with_lock_spec.rb
@@ -20,10 +20,13 @@ def locks_count
 
   it "updates the field" do
     count_before = locks_count
+
     model.with_lock do
-      expect(locks_count).to eq(count_before + 1)
+      expect(locks_count).to eq(count_before + 2)
       model.update(count: 1)
     end
+
     expect(locks_count).to eq(count_before)
+    expect(model.count).to eq(1)
   end
 end
diff --git a/umbrellio-sequel-plugins.gemspec b/umbrellio-sequel-plugins.gemspec
index b843779..d52909f 100644
--- a/umbrellio-sequel-plugins.gemspec
+++ b/umbrellio-sequel-plugins.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency "symbiont-ruby", ">= 0.6"
 
   spec.add_development_dependency "bundler"
-  spec.add_development_dependency "coveralls"
+  spec.add_development_dependency "coveralls", ">= 0.8"
   spec.add_development_dependency "money"
   spec.add_development_dependency "pg"
   spec.add_development_dependency "pry"