diff --git a/rails/blog/Gemfile.lock b/rails/blog/Gemfile.lock
index ce7f11d..d000d25 100644
--- a/rails/blog/Gemfile.lock
+++ b/rails/blog/Gemfile.lock
@@ -90,7 +90,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     public_suffix (2.0.5)
     puma (3.12.6)
-    rack (2.2.3)
+    rack (2.2.3.1)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.1.2)