diff --git a/Gemfile.lock b/Gemfile.lock
index 7653639..75bf934 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -378,7 +378,7 @@ GEM
     powerpack (0.1.1)
     proxifier (1.0.3)
     public_suffix (2.0.5)
-    rack (2.0.1)
+    rack (2.2.3)
     rainbow (2.2.1)
     rake (12.0.0)
     rbvmomi (1.11.0)