diff --git a/.travis.yml b/.travis.yml
index 4062eda..ecd7780 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ rvm:
   - 2.1.8
   - 2.2.4
   - 2.3.0
+  - 2.4.0
   - ruby-head
 
 gemfile:
@@ -17,6 +18,7 @@ gemfile:
   - gemfiles/activerecord_50_pg_018.gemfile
   - gemfiles/activerecord_51_pg_020.gemfile
   - gemfiles/activerecord_51_pg_021.gemfile
+  - gemfiles/activerecord_52_pg_100.gemfile
 
 services:
   - postgresql
@@ -34,10 +36,14 @@ matrix:
     - rvm: 2.0.0
       gemfile: gemfiles/activerecord_51_pg_020.gemfile
     - rvm: 2.0.0
-      gemfile: gemfiles/activerecord_51_pg_021.gemfile
+      gemfile: gemfiles/activerecord_51_pg_020.gemfile
+    - rvm: 2.0.0
+      gemfile: gemfiles/activerecord_52_pg_100.gemfile
     - rvm: 2.1.8
       gemfile: gemfiles/activerecord_50_pg_018.gemfile
     - rvm: 2.1.8
       gemfile: gemfiles/activerecord_51_pg_020.gemfile
     - rvm: 2.1.8
       gemfile: gemfiles/activerecord_51_pg_021.gemfile
+    - rvm: 2.1.8
+      gemfile: gemfiles/activerecord_52_pg_100.gemfile
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b15458..707be30 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
+## 1.1.7
+
+* [IMPROVE] Update rails/pg version support (rails 5.2, pg 1.0)
+
 ## 1.1.6
 
-* [IMPROVE] Adds `table_name` prefix  for a generating SQL queries ([#21](https://github.com/sjke/pg_ltree/pull/21) by [@arjan0307](https://github.com/arjan0307))
+* [IMPROVE] Adds `table_name` prefix for a generating SQL queries ([#21](https://github.com/sjke/pg_ltree/pull/21) by [@arjan0307](https://github.com/arjan0307))
 
 ## 1.1.5
 
diff --git a/README.md b/README.md
index a1aeb9e..5fec47b 100644
--- a/README.md
+++ b/README.md
@@ -4,12 +4,11 @@
 
 It uses a implementation based around PostgreSQL's [ltree](http://www.postgresql.org/docs/current/static/ltree.html) data type, associated functions and operators.
 
-|               |                                  |
-|---------------|:--------------------------------:|
-| **Author**    | Andrei Panamarenka               |
-| **Version**   | 1.1.6 (September 19, 2017)       |
-| **License**   | Released under the MIT license.  |
-
+|             |                                 |
+| ----------- | :-----------------------------: |
+| **Author**  |       Andrei Panamarenka        |
+| **Version** |     1.1.7 (March 20, 2018)      |
+| **License** | Released under the MIT license. |
 
 ##
 
@@ -19,15 +18,16 @@ It uses a implementation based around PostgreSQL's [ltree](http://www.postgresql
 [![RubyDoc](http://inch-ci.org/github/sjke/pg_ltree.svg?branch=master)](http://www.rubydoc.info/github/sjke/pg_ltree/)
 
 ## Support
-  * ***Ruby*** 2.*
-  * ***Rails*** >= 4, < 5.2
-  * ***Pg adapter (gem 'pg')*** >= 0.17, < 0.22
+
+* **_Ruby_** 2.\*
+* **_Rails_** >= 4, < 5.3
+* **_Pg adapter (gem 'pg')_** >= 0.17, < 2
 
 ## Installation
 
 Add this line to your application's Gemfile:
 
-    gem 'pg_ltree', '1.1.6'
+    gem 'pg_ltree', '1.1.7'
 
 And then execute:
 
@@ -35,7 +35,7 @@ And then execute:
 
 Add ltree extension to PostgreSQL:
 
-``` ruby
+```ruby
 class AddLtreeExtension < ActiveRecord::Migration
   def change
     enable_extension 'ltree'
@@ -45,7 +45,7 @@ end
 
 Update your model:
 
-``` ruby
+```ruby
 class AnyModel < ActiveRecord::Migration
   def change
     add_column :any_model, :path, :ltree
@@ -61,7 +61,7 @@ Run migrations:
 
 ## Usage
 
-``` ruby
+```ruby
   class AnyModel < ActiveRecord::Base
     ltree :path
     # ltree :path, cascade: false # Disable cascade update and delete
@@ -79,6 +79,7 @@ Run migrations:
 ```
 
 For find a lots of additional information about PgLtee see:
+
 * [Wiki](https://github.com/sjke/pg_ltree/wiki)
 * [List of methods for work with LTree](https://github.com/sjke/pg_ltree/wiki/List-of-methods-for-work-with-LTree)
 * [Module SCOPE FOR (For not uniq path in tree)](https://github.com/sjke/pg_ltree/wiki/Module-SCOPED-FOR)
diff --git a/Rakefile b/Rakefile
index f131eb2..eadebd1 100644
--- a/Rakefile
+++ b/Rakefile
@@ -29,7 +29,7 @@ namespace :test do
     activerecord_41_pg_017 activerecord_41_pg_018
     activerecord_42_pg_017 activerecord_42_pg_018
     activerecord_50_pg_018 activerecord_51_pg_020
-    activerecord_51_pg_021
+    activerecord_51_pg_021 activerecord_52_pg_100
   ).freeze
 
   AVAILABLE_CASES.each do |version|
diff --git a/gemfiles/activerecord_52_pg_100.gemfile b/gemfiles/activerecord_52_pg_100.gemfile
new file mode 100644
index 0000000..12b2148
--- /dev/null
+++ b/gemfiles/activerecord_52_pg_100.gemfile
@@ -0,0 +1,6 @@
+source 'https://rubygems.org'
+
+gem 'activerecord', '>= 5.2.0.rc1', '< 5.3', require: 'active_record'
+gem 'pg', '~> 1.0'
+
+gemspec path: '../'
diff --git a/lib/pg_ltree/version.rb b/lib/pg_ltree/version.rb
index 7c91dfe..973f394 100644
--- a/lib/pg_ltree/version.rb
+++ b/lib/pg_ltree/version.rb
@@ -3,5 +3,5 @@
 # @author a.ponomarenko
 module PgLtree
   # Gem Version
-  VERSION = '1.1.6'.freeze
+  VERSION = '1.1.7'.freeze
 end
diff --git a/pg_ltree.gemspec b/pg_ltree.gemspec
index cf6ef94..c002e0d 100644
--- a/pg_ltree.gemspec
+++ b/pg_ltree.gemspec
@@ -18,8 +18,8 @@ Gem::Specification.new do |s|
   s.files = Dir['{app,config,db,lib}/**/*', 'MIT-LICENSE', 'Rakefile', 'README.rdoc']
   s.test_files = Dir['test/**/*']
 
-  s.add_dependency 'activerecord', '>= 4.0.0', '< 5.2'
-  s.add_dependency 'pg', '>= 0.17.0', '< 0.22'
+  s.add_dependency 'activerecord', '>= 4.0.0', '< 5.3'
+  s.add_dependency 'pg', '>= 0.17.0', '< 2'
 
   s.add_development_dependency 'bundler'
   s.add_development_dependency 'rake'