diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9cc8cd3d..f680c149 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 #### Features
 
 * [#583](https://github.com/ruby-grape/grape-swagger/pull/583): Issue #582: document file response - [@LeFnord](https://github.com/LeFnord).
+* [#588](https://github.com/ruby-grape/grape-swagger/pull/588): Allow extension keys in Info object - [@mattyr](https://github.com/mattyr).
 
 * Your contribution here.
 
diff --git a/README.md b/README.md
index 4ab0992d..44a6c091 100644
--- a/README.md
+++ b/README.md
@@ -858,11 +858,25 @@ end
 #### Extensions
 
 Swagger spec2.0 supports extensions on different levels, for the moment,
-the documentation on `verb`, `path` and `definition` level would be supported.
+the documentation on `info`, `verb`, `path` and `definition` level would be supported.
 The documented key would be generated from the `x` + `-` + key of the submitted hash,
 for possibilities refer to the [extensions spec](spec/lib/extensions_spec.rb).
 To get an overview *how* the extensions would be defined on grape level, see the following examples:
 
+- `info` extension, add a `x` key to the `info` hash when calling ```add_swagger_documentation```:
+```ruby
+  add_swagger_documentation \
+    info: {
+      x: { some: 'stuff' }
+    }
+```
+this would generate:
+```json
+"info":{
+  "x-some":"stuff"
+}
+```
+
 - `verb` extension, add a `x` key to the `desc` hash:
 ```ruby
 desc 'This returns something with extension on verb level',
diff --git a/lib/grape-swagger/doc_methods/extensions.rb b/lib/grape-swagger/doc_methods/extensions.rb
index 1762922f..ad1ac195 100644
--- a/lib/grape-swagger/doc_methods/extensions.rb
+++ b/lib/grape-swagger/doc_methods/extensions.rb
@@ -13,6 +13,10 @@ def add(path, definitions, route)
           add_extensions_to_definition(settings, path, definitions) if settings && extended?(settings, :x_def)
         end
 
+        def add_extensions_to_info(settings, info)
+          add_extension_to(info, extension(settings)) if extended?(settings, :x)
+        end
+
         def add_extensions_to_path(settings, path)
           add_extension_to(path, extension(settings, :x_path))
         end
diff --git a/lib/grape-swagger/endpoint.rb b/lib/grape-swagger/endpoint.rb
index 2dc21e0f..a5ce7cad 100644
--- a/lib/grape-swagger/endpoint.rb
+++ b/lib/grape-swagger/endpoint.rb
@@ -35,14 +35,18 @@ def swagger_object(target_class, request, options)
 
     # building info object
     def info_object(infos)
-      {
+      result = {
         title:             infos[:title] || 'API title',
         description:       infos[:description],
         termsOfServiceUrl: infos[:terms_of_service_url],
         contact:           contact_object(infos),
         license:           license_object(infos),
         version:           infos[:version]
-      }.delete_if { |_, value| value.blank? }
+      }
+
+      GrapeSwagger::DocMethods::Extensions.add_extensions_to_info(infos, result)
+
+      result.delete_if { |_, value| value.blank? }
     end
 
     # sub-objects of info object
diff --git a/spec/swagger_v2/default_api_spec.rb b/spec/swagger_v2/default_api_spec.rb
index 2e61bf0e..30213f6b 100644
--- a/spec/swagger_v2/default_api_spec.rb
+++ b/spec/swagger_v2/default_api_spec.rb
@@ -98,7 +98,10 @@ def app
           license: 'Apache 2',
           license_url: 'http://test.com',
           terms_of_service_url: 'http://terms.com',
-          contact_email: 'support@test.com'
+          contact_email: 'support@test.com',
+          x: {
+            logo: 'http://logo.com/img.png'
+          }
         }
       end
     end
@@ -131,5 +134,9 @@ def app
     it 'documents the contact email' do
       expect(subject['contact']['email']).to eql('support@test.com')
     end
+
+    it 'documents the extension field' do
+      expect(subject['x-logo']).to eql('http://logo.com/img.png')
+    end
   end
 end