diff --git a/Gemfile.lock b/Gemfile.lock
index 6e8db2a..0c6567b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -81,7 +81,7 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-oauth2 (1.2.2)
       activesupport (>= 2.3)
       attr_required (>= 0.0.5)