diff --git a/Gemfile b/Gemfile
index c1ef9bd..37311fb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -37,5 +37,5 @@ group :development do
   gem "rspec", "~>3.1"
   gem "shoulda", "~> 3.5"
   gem "jeweler", "~> 2.1"
-  gem 'yard', "~> 0.8"
+  gem 'yard', '~> 0.9', '>= 0.9.20'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index cb9d342..9b1e892 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -126,7 +126,7 @@ GEM
       simple_oauth (~> 0.1.4)
     tzinfo (0.3.38)
     yajl-ruby (1.3.1)
-    yard (0.8.7.2)
+    yard (0.9.20)
 
 PLATFORMS
   ruby
@@ -147,7 +147,7 @@ DEPENDENCIES
   tilt (~> 2)
   tinder (~> 1.10.1)
   yajl-ruby (~> 1.3.1)
-  yard (~> 0.8)
+  yard (~> 0.9, >= 0.9.20)
 
 BUNDLED WITH
-   1.17.2
+   1.17.3