diff --git a/Gemfile.lock b/Gemfile.lock
index 3b212e9b7..e17aae7db 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -127,7 +127,7 @@ GEM
     public_suffix (3.0.2)
     puma (3.12.0)
     puma (3.12.0-java)
-    rack (2.0.5)
+    rack (2.0.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.1.6)