diff --git a/Gemfile.lock b/Gemfile.lock
index 36f34f1..fddb797 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -257,7 +257,7 @@ GEM
       sass-rails (~> 5.0)
       useragent
     racc (1.6.0)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.6)
@@ -481,6 +481,7 @@ GEM
 
 PLATFORMS
   x86_64-darwin-18
+  x86_64-linux
 
 DEPENDENCIES
   better_errors