diff --git a/.travis.yml b/.travis.yml
index aae54d8..a2ba4b6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,12 +2,12 @@ dist: trusty
 language: ruby
 sudo: required
 rvm:
-  - 2.4.0
-  - 2.3.3
-  - 2.2.6
+  - 2.4.1
+  - 2.3.4
+  - 2.2.7
   - jruby-9.0.5.0
 gemfile:
-  - gemfiles/ar50.gemfile
+  - gemfiles/ar51.gemfile
 matrix:
   allow_failures:
     - rvm: jruby-9.0.5.0
diff --git a/Appraisals b/Appraisals
index 477b6be..595bc2e 100644
--- a/Appraisals
+++ b/Appraisals
@@ -1,3 +1,3 @@
-appraise "ar50" do
-  gem "activerecord", "~> 5.0.0"
+appraise "ar51" do
+  gem "activerecord", "~> 5.1.0"
 end
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index fc7b85c..dad3fd4 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -20,18 +20,15 @@ bundle install
 
 Make sure the tests pass:
 
-`rake`
+`bundle exec rake`
 
-Run tests against both ActiveRecord 4.0 and 4.1 test gemfiles:
+Run tests against the test gemfiles:
 
 run `rake appraisal` or run the tests manually:
 
 ```
-BUNDLE_GEMFILE=./gemfiles/ar40.gemfile bundle
-BUNDLE_GEMFILE=./gemfiles/ar40.gemfile rake
-
-BUNDLE_GEMFILE=./gemfiles/ar41.gemfile bundle
-BUNDLE_GEMFILE=./gemfiles/ar41.gemfile rake
+BUNDLE_GEMFILE=./gemfiles/ar51.gemfile bundle
+BUNDLE_GEMFILE=./gemfiles/ar51.gemfile rake
 ```
 
 Make your changes and submit a pull request.
diff --git a/History.md b/History.md
index ef86e3c..e069644 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,8 @@
+### 2.0.1 / 2017-05-01
+
+* Support ActiveRecord 5.1
+* Fix activerecord gem dependency
+
 ### 1.0.0 / 2017-02-09
 
 * Release
diff --git a/README.md b/README.md
index e2d39c2..d44cce6 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,16 @@ gem 'ffi-geos'
 
 _JRuby support for Rails 4.0 and 4.1 was added in version 2.2.0_
 
+#### Version 5.x supports ActiveRecord 5.1+
+
+Requirements:
+
+```
+ActiveRecord 5.1+
+Ruby 2.2.2+ (no JRuby support yet)
+PostGIS 2.0+
+```
+
 #### Version 4.x supports ActiveRecord 5.0+
 
 Requirements:
diff --git a/activerecord-postgis-adapter.gemspec b/activerecord-mysql2rgeo-adapter.gemspec
similarity index 91%
rename from activerecord-postgis-adapter.gemspec
rename to activerecord-mysql2rgeo-adapter.gemspec
index 9a84486..9fb7519 100644
--- a/activerecord-postgis-adapter.gemspec
+++ b/activerecord-mysql2rgeo-adapter.gemspec
@@ -19,8 +19,8 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = ">= 2.2.2"
 
-  spec.add_dependency "activerecord", "~> 5.0.0"
-  spec.add_dependency "rgeo-activerecord", "~> 5.0.0"
+  spec.add_dependency "activerecord", "~> 5.1"
+  spec.add_dependency "rgeo-activerecord", "~> 5.1"
 
   spec.add_development_dependency "rake", "~> 12.0"
   spec.add_development_dependency "minitest", "~> 5.4"
diff --git a/gemfiles/ar42.gemfile b/gemfiles/ar42.gemfile
deleted file mode 100644
index a574e0c..0000000
--- a/gemfiles/ar42.gemfile
+++ /dev/null
@@ -1,12 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "mysql2", "~> 0.4.4", platform: :ruby
-gem 'jdbc-mysql', platform: :jruby
-gem 'activerecord-jdbc-adapter', platform: :jruby
-gem "ffi-geos", platform: :jruby
-gem "byebug", platform: :mri_22
-gem "activerecord", "~> 4.2.0"
-
-gemspec :path => "../"
diff --git a/gemfiles/ar50.gemfile b/gemfiles/ar50.gemfile
deleted file mode 100644
index 1a36bc4..0000000
--- a/gemfiles/ar50.gemfile
+++ /dev/null
@@ -1,12 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "mysql2", "~> 0.4.4", platform: :ruby
-gem "jdbc-mysql", platform: :jruby
-gem "activerecord-jdbc-adapter", '~> 5.0.pre1', platform: :jruby
-gem "ffi-geos", platform: :jruby
-gem "byebug", platform: :mri_23
-gem "activerecord", "~> 5.0.0"
-
-gemspec :path => "../"
diff --git a/gemfiles/ar51.gemfile b/gemfiles/ar51.gemfile
new file mode 100644
index 0000000..97d077a
--- /dev/null
+++ b/gemfiles/ar51.gemfile
@@ -0,0 +1,11 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "mysql2", "~> 0.4", platform: :ruby
+gem "activerecord-jdbcmysql-adapter", '~> 1.3', platform: :jruby
+gem "ffi-geos", platform: :jruby
+gem "byebug", platform: :mri_23
+gem "activerecord", "~> 5.1.0"
+
+gemspec :path => "../"
diff --git a/lib/active_record/connection_adapters/mysql2rgeo/schema_statements.rb b/lib/active_record/connection_adapters/mysql2rgeo/schema_statements.rb
index d5b8459..d130338 100644
--- a/lib/active_record/connection_adapters/mysql2rgeo/schema_statements.rb
+++ b/lib/active_record/connection_adapters/mysql2rgeo/schema_statements.rb
@@ -7,13 +7,13 @@ def new_column(*args)
           SpatialColumn.new(*args)
         end
 
-        def type_to_sql(type, limit = nil, precision = nil, scale = nil, array = nil)
+        def type_to_sql(type, limit: nil, precision: nil, scale: nil, unsigned: nil, **) # :nodoc:
           if (info = spatial_column_constructor(type.to_sym))
             type = limit[:type] || type if limit.is_a?(::Hash)
-            type = "geometry" if type.to_s == "spatial"
+            type = 'geometry' if type.to_s.eql? 'spatial'
             type = type.to_s.delete("_").upcase
           end
-          super(type, limit, precision, scale, array)
+          super
         end
 
         def spatial_column_constructor(name)
diff --git a/lib/active_record/connection_adapters/mysql2rgeo/spatial_table_definition.rb b/lib/active_record/connection_adapters/mysql2rgeo/spatial_table_definition.rb
index 7668164..e01be64 100644
--- a/lib/active_record/connection_adapters/mysql2rgeo/spatial_table_definition.rb
+++ b/lib/active_record/connection_adapters/mysql2rgeo/spatial_table_definition.rb
@@ -11,64 +11,34 @@ def new_column_definition(name, type, options)
               options.merge!(limit) if limit.is_a?(::Hash)
             end
 
-            geo_type = ColumnDefinition.geo_type(options[:type] || type || info[:type])
+            geo_type = ColumnDefinitionUtils.geo_type(options[:type] || type || info[:type])
             base_type = info[:type] || :geometry
 
             # puts name.dup << " - " << type.to_s << " - " << options.to_s << " :: " << geo_type.to_s << " - " << base_type.to_s
 
+            options[:spatial_type] = geo_type
             column = super(name, geo_type.downcase.to_sym, options)
-            column.spatial_type = geo_type
-            column.srid = options[:srid]
           else
             column = super(name, type, options)
           end
 
           column
         end
-
-        private
-
-        def create_column_definition(name, type)
-          if Mysql2RgeoAdapter.spatial_column_options(type.to_sym)
-            Mysql2Rgeo::ColumnDefinition.new(name, type)
-          else
-            super
-          end
-        end
       end
 
-      class ColumnDefinition < MySQL::ColumnDefinition
-        # needs to accept the spatial type? or figure out from limit ?
-
-        def self.geo_type(type = "GEOMETRY")
-          g_type = type.to_s.delete("_").upcase
-          return "POINT" if g_type == "POINT"
-          return "POLYGON" if g_type == "POLYGON"
-          g_type
-        end
-
-        def spatial_type
-          @spatial_type
-        end
-
-        def spatial_type=(value)
-          @spatial_type = value.to_s
-        end
+      SpatialIndexDefinition = Struct.new(*IndexDefinition.members, :spatial)
 
-        def srid
-          if @srid
-            @srid.to_i
-          else
-            Mysql2RgeoAdapter::DEFAULT_SRID
+      module ColumnDefinitionUtils
+        class << self
+          def geo_type(type = "GEOMETRY")
+            type.to_s.delete('_').upcase
           end
-        end
 
-        def srid=(value)
-          @srid = value
+          def default_srid(options)
+            options[:geographic] ? 4326 : Mysql2RgeoAdapter::DEFAULT_SRID
+          end
         end
       end
-
-      SpatialIndexDefinition = Struct.new(*IndexDefinition.members, :spatial)
     end
   end
 end
diff --git a/lib/active_record/connection_adapters/mysql2rgeo/version.rb b/lib/active_record/connection_adapters/mysql2rgeo/version.rb
index 9121dc2..222a250 100644
--- a/lib/active_record/connection_adapters/mysql2rgeo/version.rb
+++ b/lib/active_record/connection_adapters/mysql2rgeo/version.rb
@@ -1,7 +1,7 @@
 module ActiveRecord
   module ConnectionAdapters
     module Mysql2Rgeo
-      VERSION = "1.0.4".freeze
+      VERSION = "2.0.1".freeze
     end
   end
 end
diff --git a/lib/active_record/connection_adapters/mysql2rgeo_adapter.rb b/lib/active_record/connection_adapters/mysql2rgeo_adapter.rb
index 020357d..1a0441d 100644
--- a/lib/active_record/connection_adapters/mysql2rgeo_adapter.rb
+++ b/lib/active_record/connection_adapters/mysql2rgeo_adapter.rb
@@ -28,13 +28,13 @@ class Mysql2RgeoAdapter < Mysql2Adapter
           geometry: {},
           geometrycollection: {},
           linestring: {},
-          spatial: { type: "geometry" }.freeze,
-          point: {},
-          polygon: {},
           multilinestring: {},
           multipoint: {},
           multipolygon: {},
-        }.freeze
+          spatial: { type: "geometry" },
+          point: {},
+          polygon: {}
+        }
 
       # http://postgis.17.x6.nabble.com/Default-SRID-td5001115.html
       DEFAULT_SRID = 0
@@ -61,7 +61,13 @@ def supports_spatial?
       end
 
       # Returns an array of indexes for the given table.
-      def indexes(table_name, _name = nil) #:nodoc:
+      def indexes(table_name, name = nil) #:nodoc:
+        if name
+          ActiveSupport::Deprecation.warn(<<-MSG.squish)
+            Passing name to #indexes is deprecated without replacement.
+          MSG
+        end
+
         indexes = []
         current_index = nil
         execute_and_free("SHOW KEYS FROM #{quote_table_name(table_name)}", "SCHEMA") do |result|
@@ -78,7 +84,7 @@ def indexes(table_name, _name = nil) #:nodoc:
                            options.push(true)
                            Mysql2Rgeo::SpatialIndexDefinition.new(*options)
                          else
-                           IndexDefinition.new(*options)
+                           IndexDefinition.new(row[:Table], row[:Key_name], row[:Non_unique].to_i == 0, [], {}, nil, nil, index_type, index_using, row[:Index_comment].presence)
                          end
             end
 
@@ -90,7 +96,7 @@ def indexes(table_name, _name = nil) #:nodoc:
         indexes
       end
 
-      def quote(value, column = nil)
+      def quote(value)
         if RGeo::Feature::Geometry.check_type(value)
           "ST_GeomFromWKB(0x#{RGeo::WKRep::WKBGenerator.new(hex_format: true, little_endian: true).generate(value)},#{value.srid})"
         else
diff --git a/test/ddl_test.rb b/test/ddl_test.rb
index 78d9f1a..b80ff3e 100644
--- a/test/ddl_test.rb
+++ b/test/ddl_test.rb
@@ -18,7 +18,7 @@ def test_spatial_column_options
 
   def test_type_to_sql
     adapter = SpatialModel.connection
-    assert_equal "GEOMETRY", adapter.type_to_sql(:geometry, "point,4326")
+    assert_equal "GEOMETRY", adapter.type_to_sql(:geometry, limit: "point,4326")
   end
 
   def test_create_simple_geometry
@@ -270,21 +270,6 @@ def test_non_spatial_column_limits
     assert_equal 123, col.limit
   end
 
-  def test_includes_spatial_types
-    klass.connection.create_table("spatial_types", force: true, options: "ENGINE=MyISAM") do |t|
-      t.geometry   :geometry_field
-      t.polygon    :polygon_field, null: false, index: { type: :spatial }
-      t.point      :point_field
-      t.linestring :linestring_field
-
-      t.geometry   :geometry_multi, multi: true
-      t.polygon    :polygon_multi, multi: true
-      t.point      :point_multi, multi: true
-      t.linestring :linestring_multi, multi: true
-    end
-    klass.reset_column_information
-  end
-
   private
 
   def klass
diff --git a/test/spatial_queries_test.rb b/test/spatial_queries_test.rb
index 3dc202c..b117d45 100644
--- a/test/spatial_queries_test.rb
+++ b/test/spatial_queries_test.rb
@@ -21,7 +21,6 @@ def test_query_point_wkt
     obj.save!
     id = obj.id
     obj2 = SpatialModel.where(latlon: "POINT(1 2)").first
-    puts obj2
     refute_nil(obj2)
     assert_equal(id, obj2.id)
     obj3 = SpatialModel.where(latlon: "POINT(2 2)").first
diff --git a/test/tasks_test.rb b/test/tasks_test.rb
index 7dfb02b..1b78995 100644
--- a/test/tasks_test.rb
+++ b/test/tasks_test.rb
@@ -3,7 +3,7 @@
 
 class TasksTest < ActiveSupport::TestCase  # :nodoc:
   NEW_CONNECTION = {
-    "adapter" => "mysql2rgeo",
+    "adapter"            => "mysql2rgeo",
     "host"               => "127.0.0.1",
     "database"           => "mysql2rgeo_tasks_test",
     "username"           => "root",
@@ -79,7 +79,6 @@ def test_basic_geography_schema_dump
       ActiveRecord::SchemaDumper.dump(connection, file)
     end
     data = File.read(tmp_sql_filename)
-
     assert data.index(%(t.geometry "latlon1", limit: {:type=>"point", :srid=>0}))
     assert data.index(%(t.geometry "latlon2", limit: {:type=>"point", :srid=>0}))
   end
@@ -94,7 +93,6 @@ def test_index_schema_dump
       ActiveRecord::SchemaDumper.dump(connection, file)
     end
     data = File.read(tmp_sql_filename)
-
     assert data.index(%(t.geometry "latlon", limit: {:type=>"point", :srid=>0}, null: false))
     assert data.index(%(t.index ["latlon"], name: "index_spatial_test_on_latlon", type: :spatial))
   end