diff --git a/Gemfile.lock b/Gemfile.lock
index 41fde93..f545516 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -104,7 +104,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    rack (2.0.8)
+    rack (2.2.3)
     rest-client (1.6.7)
       mime-types (>= 1.16)
     slop (3.6.0)