diff --git a/ruby/google_drive-trial/Gemfile.lock b/ruby/google_drive-trial/Gemfile.lock
index d0905ee..d5c2f07 100644
--- a/ruby/google_drive-trial/Gemfile.lock
+++ b/ruby/google_drive-trial/Gemfile.lock
@@ -15,7 +15,7 @@ GEM
     multi_xml (0.5.3)
     multipart-post (1.2.0)
     nokogiri (1.5.6)
-    oauth (0.4.7)
+    oauth (0.5.6)
     oauth2 (0.9.1)
       faraday (~> 0.8)
       httpauth (~> 0.1)