diff --git a/Gemfile.lock b/Gemfile.lock
index dadf140..ffc81a1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,7 @@ GEM
       pry (>= 0.9.10)
     puma (4.3.1)
       nio4r (~> 2.0)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.1.2)