diff --git a/.travis.yml b/.travis.yml
index 9f38b6de..f2903fc1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,9 +7,11 @@ before_script:
   - mysql -e 'create database acts_as_list;'
   - psql -c 'create database acts_as_list;' -U postgres
 rvm:
-  - 2.4.7
-  - 2.5.6
-  - 2.6.4
+  - 2.4
+  - 2.5
+  - 2.6
+  - 2.7
+  - 3.0
 services:
   - mysql
   - postgresql
@@ -26,7 +28,28 @@ gemfile:
   - gemfiles/rails_6_1.gemfile
 matrix:
   exclude:
-    - rvm: 2.4.7
+    - rvm: 2.4
       gemfile: gemfiles/rails_6_0.gemfile
-    - rvm: 2.4.7
+    - rvm: 2.4
       gemfile: gemfiles/rails_6_1.gemfile
+    # Ruby 2.7 uses a `bigdecimal` version that doesn't support BigDecimal.new
+    # that Rails 4.2 uses. See also:
+    # https://github.com/ruby/bigdecimal#which-version-should-you-select
+    - rvm: 2.7
+      gemfile: gemfiles/rails_4_2.gemfile
+    # Ruby 2.7 warning `sqlite3-1.3.13/lib/sqlite3/statement.rb:108: warning: rb_tainted_str_new is deprecated`
+    # and job wil exceed the maximum log length
+    # see also: https://github.com/sparklemotion/sqlite3-ruby/issues/276
+    - rvm: 2.7
+      gemfile: gemfiles/rails_5_0.gemfile
+      env: DB=sqlite
+    # Rails <6 does not support Ruby 3, see:
+    # https://github.com/rails/rails/issues/40938#issuecomment-751898275
+    - rvm: 3.0
+      gemfile: gemfiles/rails_4_2.gemfile
+    - rvm: 3.0
+      gemfile: gemfiles/rails_5_0.gemfile
+    - rvm: 3.0
+      gemfile: gemfiles/rails_5_1.gemfile
+    - rvm: 3.0
+      gemfile: gemfiles/rails_5_2.gemfile
diff --git a/Gemfile b/Gemfile
index de842e26..d383a009 100644
--- a/Gemfile
+++ b/Gemfile
@@ -20,7 +20,7 @@ group :sqlite do
 end
 
 group :postgresql do
-  gem "pg", "~> 1.1.4"
+  gem "pg", "~> 1.2.0"
 end
 
 group :mysql do
diff --git a/gemfiles/rails_5_0.gemfile b/gemfiles/rails_5_0.gemfile
index abed9be0..1caba108 100644
--- a/gemfiles/rails_5_0.gemfile
+++ b/gemfiles/rails_5_0.gemfile
@@ -21,7 +21,7 @@ group :sqlite do
 end
 
 group :postgresql do
-  gem "pg", "~> 1.1.4"
+  gem "pg", "~> 1.2.0"
 end
 
 group :mysql do
diff --git a/gemfiles/rails_5_1.gemfile b/gemfiles/rails_5_1.gemfile
index 1fce24ae..f3837b02 100644
--- a/gemfiles/rails_5_1.gemfile
+++ b/gemfiles/rails_5_1.gemfile
@@ -21,7 +21,7 @@ group :sqlite do
 end
 
 group :postgresql do
-  gem "pg", "~> 1.1.4"
+  gem "pg", "~> 1.2.0"
 end
 
 group :mysql do
diff --git a/gemfiles/rails_5_2.gemfile b/gemfiles/rails_5_2.gemfile
index e2c51432..4044acf9 100644
--- a/gemfiles/rails_5_2.gemfile
+++ b/gemfiles/rails_5_2.gemfile
@@ -21,7 +21,7 @@ group :sqlite do
 end
 
 group :postgresql do
-  gem "pg", "~> 1.1.4"
+  gem "pg", "~> 1.2.0"
 end
 
 group :mysql do
diff --git a/gemfiles/rails_6_0.gemfile b/gemfiles/rails_6_0.gemfile
index ca52745a..d329a79d 100644
--- a/gemfiles/rails_6_0.gemfile
+++ b/gemfiles/rails_6_0.gemfile
@@ -21,7 +21,7 @@ group :sqlite do
 end
 
 group :postgresql do
-  gem "pg", "~> 1.1.4"
+  gem "pg", "~> 1.2.0"
 end
 
 group :mysql do
diff --git a/gemfiles/rails_6_1.gemfile b/gemfiles/rails_6_1.gemfile
index 3f13878b..9b2f40d4 100644
--- a/gemfiles/rails_6_1.gemfile
+++ b/gemfiles/rails_6_1.gemfile
@@ -21,7 +21,7 @@ group :sqlite do
 end
 
 group :postgresql do
-  gem "pg", "~> 1.1.4"
+  gem "pg", "~> 1.2.0"
 end
 
 group :mysql do
diff --git a/test/test_list.rb b/test/test_list.rb
index 495f99ae..8a3d3138 100644
--- a/test/test_list.rb
+++ b/test/test_list.rb
@@ -11,7 +11,7 @@ def setup_db(position_options = {})
 
   # AR caches columns options like defaults etc. Clear them!
   ActiveRecord::Base.connection.create_table :mixins do |t|
-    t.column :pos, :integer, position_options unless position_options[:positive] && sqlite
+    t.column :pos, :integer, **position_options unless position_options[:positive] && sqlite
     t.column :active, :boolean, default: true
     t.column :parent_id, :integer
     t.column :parent_type, :string