diff --git a/.rubocop.yml b/.rubocop.yml
index 5586e337..720c828a 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -16,3 +16,5 @@ Style/RescueStandardError:
   Enabled: false
 Style/DateTime:
   Enabled: false
+AllCops:
+  TargetRubyVersion: 2.6
diff --git a/lib/hanami/entity/schema.rb b/lib/hanami/entity/schema.rb
index 7f41e788..3edd8b90 100644
--- a/lib/hanami/entity/schema.rb
+++ b/lib/hanami/entity/schema.rb
@@ -169,7 +169,7 @@ def initialize(type = nil, &blk)
           raise LocalJumpError unless block_given?
 
           @attributes, @schema = Dsl.build(type, &blk)
-          @attributes = Hash[@attributes.map { |k, _| [k, true] }]
+          @attributes = @attributes.transform_values { |_| true }
           freeze
         end
 
diff --git a/lib/hanami/model/migrator/sqlite_adapter.rb b/lib/hanami/model/migrator/sqlite_adapter.rb
index 9bcf83df..3ee4f0b5 100644
--- a/lib/hanami/model/migrator/sqlite_adapter.rb
+++ b/lib/hanami/model/migrator/sqlite_adapter.rb
@@ -108,16 +108,14 @@ def load_structure
         #
         def dump_migrations_data
           execute "sqlite3 #{escape(path)} .dump" do |stdout|
-            begin
-              contents = stdout.read.split($INPUT_RECORD_SEPARATOR)
-              contents = contents.grep(/^INSERT INTO "?#{migrations_table}"?/)
-
-              ::File.open(schema, ::File::CREAT | ::File::BINARY | ::File::WRONLY | ::File::APPEND) do |file|
-                file.write(contents.join($INPUT_RECORD_SEPARATOR))
-              end
-            rescue => exception
-              raise MigrationError.new(exception.message)
+            contents = stdout.read.split($INPUT_RECORD_SEPARATOR)
+            contents = contents.grep(/^INSERT INTO "?#{migrations_table}"?/)
+
+            ::File.open(schema, ::File::CREAT | ::File::BINARY | ::File::WRONLY | ::File::APPEND) do |file|
+              file.write(contents.join($INPUT_RECORD_SEPARATOR))
             end
+          rescue => exception
+            raise MigrationError.new(exception.message)
           end
         end
       end
diff --git a/lib/hanami/model/sql/entity/schema.rb b/lib/hanami/model/sql/entity/schema.rb
index eb8a2f52..9219dc24 100644
--- a/lib/hanami/model/sql/entity/schema.rb
+++ b/lib/hanami/model/sql/entity/schema.rb
@@ -36,7 +36,7 @@ class Schema < Hanami::Entity::Schema
           def initialize(registry, relation, mapping)
             attributes  = build(registry, relation, mapping)
             @schema     = Types::Coercible::Hash.schema(attributes)
-            @attributes = Hash[attributes.map { |k, _| [k, true] }]
+            @attributes = attributes.transform_values { |_| true }
             freeze
           end