diff --git a/lib/grape-swagger/endpoint.rb b/lib/grape-swagger/endpoint.rb
index ba0ec340..d37ba0e1 100644
--- a/lib/grape-swagger/endpoint.rb
+++ b/lib/grape-swagger/endpoint.rb
@@ -321,14 +321,17 @@ def default_type(params)
     end
 
     def expose_params(value)
-      if value.is_a?(Class) && GrapeSwagger.model_parsers.find(value)
-        expose_params_from_model(value)
-      elsif value.is_a?(String)
+      case value
+      when Class
+        expose_params_from_model(value) if GrapeSwagger.model_parsers.find(value)
+      when String
         begin
-          expose_params(Object.const_get(value.gsub(/\[|\]/, ''))) # try to load class from its name
+          expose_params(Object.const_get(value))
         rescue NameError
           nil
         end
+      when Array
+        expose_params(value.first)
       end
     end
 
diff --git a/spec/swagger_v2/api_documentation_spec.rb b/spec/swagger_v2/api_documentation_spec.rb
index ac59f1fb..1a5ff9d1 100644
--- a/spec/swagger_v2/api_documentation_spec.rb
+++ b/spec/swagger_v2/api_documentation_spec.rb
@@ -27,12 +27,12 @@
             'locale' => {
               desc: 'Locale of API documentation',
               required: false,
-              type: 'Symbol'
+              type: Symbol
             },
             'name' => {
               desc: 'Resource name of mounted API',
               required: true,
-              type: 'String'
+              type: String
             }
           }
         }