diff --git a/ruby/examples/railsapi/Gemfile.lock b/ruby/examples/railsapi/Gemfile.lock
index b85da71..2dc8f5f 100644
--- a/ruby/examples/railsapi/Gemfile.lock
+++ b/ruby/examples/railsapi/Gemfile.lock
@@ -41,7 +41,7 @@ GEM
     arel (8.0.0)
     builder (3.2.3)
     byebug (10.0.0)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.5)
     crass (1.0.3)
     erubi (1.7.0)
     ffi (1.9.23)
@@ -66,7 +66,7 @@ GEM
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
     puma (3.11.2)
-    rack (2.0.4)
+    rack (2.0.7)
     rack-test (0.8.3)
       rack (>= 1.0, < 3)
     rails (5.1.5)
@@ -102,7 +102,7 @@ GEM
     spring-watcher-listen (2.0.1)
       listen (>= 2.7, < 4.0)
       spring (>= 1.2, < 3.0)
-    sprockets (3.7.1)
+    sprockets (4.0.0)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.2.1)