diff --git a/examples/determinator-rails/Gemfile.lock b/examples/determinator-rails/Gemfile.lock
index 1878a67..ca93817 100644
--- a/examples/determinator-rails/Gemfile.lock
+++ b/examples/determinator-rails/Gemfile.lock
@@ -83,6 +83,8 @@ GEM
     nio4r (2.5.4)
     nokogiri (1.11.1-x86_64-darwin)
       racc (~> 1.4)
+    nokogiri (1.11.1-x86_64-linux)
+      racc (~> 1.4)
     puma (3.12.6)
     racc (1.5.2)
     rack (2.2.3)
@@ -124,7 +126,7 @@ GEM
       sprockets (>= 3.0.0)
     thor (1.1.0)
     thread_safe (0.3.6)
-    tzinfo (1.2.9)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
@@ -132,6 +134,7 @@ GEM
 
 PLATFORMS
   x86_64-darwin-19
+  x86_64-linux
 
 DEPENDENCIES
   byebug