diff --git a/lib/schemable/definition.rb b/lib/schemable/definition.rb
index e90a9f6..ef601ee 100644
--- a/lib/schemable/definition.rb
+++ b/lib/schemable/definition.rb
@@ -92,8 +92,8 @@ module Schemable
       self.class.name.gsub('Swagger::Definitions::', '').constantize
     end
 
-    def self.model_name
-      name.gsub('Swagger::Definitions::', '').pluralize.underscore.downcase
+    def model_name
+      self.class.name.gsub('Swagger::Definitions::', '').pluralize.underscore.downcase
     end
   end
 end
diff --git a/sig/schemable/definition.rbs b/sig/schemable/definition.rbs
index bc06f3c..54a0002 100644
--- a/sig/schemable/definition.rbs
+++ b/sig/schemable/definition.rbs
@@ -246,6 +246,6 @@ module Schemable
     # @example
     #  'users' for the User model
     #  'citizen_applications' for the CitizenApplication model
-    def self.model_name: -> String
+    def model_name: -> String
   end
 end