diff --git a/Gemfile.lock b/Gemfile.lock
index 6328468..e03d2a2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (2.2.6.4)
+    rack (2.2.8.1)
     rack-protection (2.2.3)
       rack
     ruby2_keywords (0.0.5)