diff --git a/Gemfile.lock b/Gemfile.lock
index c55d84b..e34d212 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     mocha (0.9.9)
       rake
     perftools.rb (0.5.4)
-    rake (0.8.7)
+    rake (13.0.6)
     rcov (0.9.9)
     test-spec (0.10.0)
     test-unit (2.1.2)
@@ -27,5 +27,4 @@ DEPENDENCIES
   rcov (>= 0.9.9)
   test-spec (>= 0.10.0)
   test-unit (>= 2.1.2)
-  xml-simple (>= 1.0.12)
   yard (>= 0.6.2)