diff --git a/lib/schemable/configuration.rb b/lib/schemable/configuration.rb
index 6a9a3e4..85d3a00 100644
--- a/lib/schemable/configuration.rb
+++ b/lib/schemable/configuration.rb
@@ -1,4 +1,3 @@
-# configuration.rb
 module Schemable
   class Configuration
     attr_accessor(
@@ -26,7 +25,43 @@ module Schemable
     def type_mapper(type_name)
       return @custom_type_mappers[type_name] if @custom_type_mappers.key?(type_name)
 
-      TYPES_MAP[type_name.try(:to_sym)]
+      {
+        text: { type: :string },
+        string: { type: :string },
+        integer: { type: :integer },
+        boolean: { type: :boolean },
+        date: { type: :string, format: :date },
+        time: { type: :string, format: :time },
+        json: { type: :object, properties: {} },
+        hash: { type: :object, properties: {} },
+        jsonb: { type: :object, properties: {} },
+        object: { type: :object, properties: {} },
+        binary: { type: :string, format: :binary },
+        trueclass: { type: :boolean, default: true },
+        falseclass: { type: :boolean, default: false },
+        datetime: { type: :string, format: :'date-time' },
+        float: {
+          type: (@float_as_string ? :string : :number).to_s.to_sym,
+          format: :float
+        },
+        decimal: {
+          type: (@decimal_as_string ? :string : :number).to_s.to_sym,
+          format: :double
+        },
+        array: {
+          type: :array,
+          items: {
+            anyOf: [
+              { type: :string },
+              { type: :integer },
+              { type: :boolean },
+              { type: :number, format: :float },
+              { type: :object, properties: {} },
+              { type: :number, format: :double }
+            ]
+          }
+        }
+      }[type_name.try(:to_sym)]
     end
 
     def add_custom_type_mapper(type_name, mapping)
diff --git a/lib/schemable/constants.rb b/lib/schemable/constants.rb
deleted file mode 100644
index 92bfca4..0000000
--- a/lib/schemable/constants.rb
+++ /dev/null
@@ -1,41 +0,0 @@
-module Schemable
-  module Constants
-    TYPES_MAP = {
-      text: { type: :string },
-      string: { type: :string },
-      integer: { type: :integer },
-      boolean: { type: :boolean },
-      date: { type: :string, format: :date },
-      time: { type: :string, format: :time },
-      json: { type: :object, properties: {} },
-      hash: { type: :object, properties: {} },
-      jsonb: { type: :object, properties: {} },
-      object: { type: :object, properties: {} },
-      binary: { type: :string, format: :binary },
-      trueclass: { type: :boolean, default: true },
-      falseclass: { type: :boolean, default: false },
-      datetime: { type: :string, format: :'date-time' },
-      float: {
-        type: (configs[:float_as_string] ? :string : :number).to_s.to_sym,
-        format: :float
-      },
-      decimal: {
-        type: (configs[:decimal_as_string] ? :string : :number).to_s.to_sym,
-        format: :double
-      },
-      array: {
-        type: :array,
-        items: {
-          anyOf: [
-            { type: :string },
-            { type: :integer },
-            { type: :boolean },
-            { type: :number, format: :float },
-            { type: :object, properties: {} },
-            { type: :number, format: :double }
-          ]
-        }
-      }
-    }.freeze
-  end
-end
diff --git a/sig/schemable/constants.rbs b/sig/schemable/constants.rbs
deleted file mode 100644
index aab1390..0000000
--- a/sig/schemable/constants.rbs
+++ /dev/null
@@ -1,5 +0,0 @@
-module Schemable
-  module Constants
-    TYPES_MAP: Hash[Symbol, any]
-  end
-end