diff --git a/Gemfile.lock b/Gemfile.lock
index 624f6fd..4dcd289 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -82,9 +82,12 @@ GEM
       rack (>= 1.2, < 3)
     polyglot (0.3.3)
     power_assert (1.1.1)
+    psych (5.1.0)
+      stringio
     rack (1.6.8)
     rake (10.3.2)
-    rdoc (4.3.0)
+    rdoc (6.5.0)
+      psych (>= 4.0.0)
     redcarpet (3.4.0)
     rspec (3.1.0)
       rspec-core (~> 3.1.0)
@@ -106,6 +109,7 @@ GEM
     shoulda-matchers (2.4.0)
       activesupport (>= 3.0.0)
     simple_oauth (0.1.9)
+    stringio (3.0.7)
     test-unit (3.2.7)
       power_assert
     thread_safe (0.1.3)