diff --git a/Gemfile.lock b/Gemfile.lock
index a6f1e25..e2062ca 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -86,7 +86,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     racc (1.5.2)
-    rack (2.2.3)
+    rack (2.2.6.4)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.5)