diff --git a/lib/apipie/dsl_definition.rb b/lib/apipie/dsl_definition.rb
index 59819f24..6e1a4a3e 100644
--- a/lib/apipie/dsl_definition.rb
+++ b/lib/apipie/dsl_definition.rb
@@ -523,6 +523,16 @@ def apipie_update_methods(methods, *args, &block)
       # backwards compatibility
       alias apipie_update_params apipie_update_methods
 
+      def apipie_lazy_update_methods(methods, &block)
+        methods.each do |method|
+          method_desc = Apipie.get_method_description(self, method)
+          unless method_desc
+            raise "Could not find method description for #{self}##{method}. Was the method defined?"
+          end
+          method_desc.lazy_update_blocks << [self, block]
+        end
+      end
+
       def _apipie_concern_subst
         @_apipie_concern_subst ||= {
           controller_path: self.controller_path,
@@ -575,6 +585,9 @@ def included(controller)
         _apipie_concern_update_api_blocks.each do |(methods, block)|
           controller.apipie_update_methods(methods, &block)
         end
+        _apipie_concern_lazy_update_api_blocks.each do |(methods, block)|
+          controller.apipie_lazy_update_methods(methods, &block)
+        end
       end
 
       def _apipie_concern_data
@@ -585,6 +598,10 @@ def _apipie_concern_update_api_blocks
         @_apipie_concern_update_api_blocks ||= []
       end
 
+      def _apipie_concern_lazy_update_api_blocks
+        @_apipie_concern_lazy_update_api_blocks ||= []
+      end
+
       def apipie_concern?
         true
       end
@@ -604,6 +621,10 @@ def update_api(*methods, &block)
         _apipie_concern_update_api_blocks << [methods, block]
       end
 
+      def lazy_update_api(*methods, &block)
+        _apipie_concern_lazy_update_api_blocks << [methods, block]
+      end
+
     end
 
     class ResourceDescriptionDsl
diff --git a/lib/apipie/method_description.rb b/lib/apipie/method_description.rb
index c618567b..a22902ca 100644
--- a/lib/apipie/method_description.rb
+++ b/lib/apipie/method_description.rb
@@ -1,7 +1,7 @@
 module Apipie
   class MethodDescription
     attr_reader :full_description, :method, :resource, :apis, :examples, :see, :formats, :headers, :show
-    attr_accessor :metadata
+    attr_accessor :metadata, :lazy_update_blocks
 
     def initialize(method, resource, dsl_data)
       @method = method.to_s
@@ -43,6 +43,7 @@ def initialize(method, resource, dsl_data)
       else
         true
       end
+      @lazy_update_blocks = []
     end
 
     def id
@@ -73,6 +74,14 @@ def params_ordered
       all_params.find_all(&:validator)
     end
 
+    def eval_lazy_update_blocks
+      lazy_update_blocks.each do |(context, block)|
+        dsl_data = context._apipie_eval_dsl(&block)
+        context._apipie_update_params(self, dsl_data)
+        context._apipie_update_meta(self, dsl_data)
+      end
+    end
+
     def returns_self
       @returns
     end
@@ -159,6 +168,7 @@ def formats
     end
 
     def to_json(lang = nil)
+      eval_lazy_update_blocks
       {
         :doc_url => doc_url,
         :name => @method,