diff --git a/lib/active_record/connection_adapters/clickhouse/oid/map.rb b/lib/active_record/connection_adapters/clickhouse/oid/map.rb
index 6c6a1879..64d55760 100644
--- a/lib/active_record/connection_adapters/clickhouse/oid/map.rb
+++ b/lib/active_record/connection_adapters/clickhouse/oid/map.rb
@@ -33,7 +33,8 @@ def deserialize(value)
           def serialize(value)
             return '{}' if value.nil?
 
-            "{#{value.map { |k, v| "'#{k}': '#{v}'" }.join(', ')}}"
+            res = value.map { |k, v| "#{quote(k, key_type)}: #{quote(v, value_type)}" }.join(', ')
+            "{#{res}}"
           end
 
           private
@@ -48,10 +49,29 @@ def cast_type(type)
               :datetime
             when /Date/
               :date
+            when /Array\(.*\)/
+              type
             else
               :string
             end
           end
+
+          def quote(value, type)
+            case cast_type(type)
+            when :string
+              "'#{value}'"
+            when :integer
+              value
+            when :datetime, :date
+              "'#{value.iso8601}'"
+            when /Array\(.*\)/
+              byebug
+              sub_type = type.match(/Array\((.+)\)/).captures.first
+              "[#{value.map { |v| quote(v, sub_type) }.join(', ')}]"
+            else
+              value
+            end
+          end
         end
       end
     end
diff --git a/lib/active_record/connection_adapters/clickhouse_adapter.rb b/lib/active_record/connection_adapters/clickhouse_adapter.rb
index 8c98cf2c..8e036726 100644
--- a/lib/active_record/connection_adapters/clickhouse_adapter.rb
+++ b/lib/active_record/connection_adapters/clickhouse_adapter.rb
@@ -112,6 +112,8 @@ def cast_type(type)
           :datetime
         when /Date/
           :date
+        when /Array/
+          type
         else
           :string
         end
@@ -267,6 +269,8 @@ def quote(value)
         case value
         when Array
           '[' + value.map { |v| quote(v) }.join(', ') + ']'
+        when Hash
+          '{' + value.map { |k, v| "#{quote(k)}: #{quote(v)}" }.join(', ') + '}'
         else
           super
         end
diff --git a/lib/clickhouse-activerecord/schema_dumper.rb b/lib/clickhouse-activerecord/schema_dumper.rb
index cbd5a2e6..91ff6039 100644
--- a/lib/clickhouse-activerecord/schema_dumper.rb
+++ b/lib/clickhouse-activerecord/schema_dumper.rb
@@ -175,6 +175,7 @@ def prepare_column_options(column)
       if column.type == :map
         spec[:key_type] = "\"#{column.key_type}\""
         spec[:value_type] = "\"#{column.value_type}\""
+        spec[:array] = nil
       end
 
       spec.merge(super).compact