diff --git a/examples/rails/Gemfile.lock b/examples/rails/Gemfile.lock
index a0d99c3..f0a60c0 100644
--- a/examples/rails/Gemfile.lock
+++ b/examples/rails/Gemfile.lock
@@ -102,11 +102,11 @@ GEM
     minitest (5.14.0)
     msgpack (1.3.3)
     multipart-post (2.1.1)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     public_suffix (4.0.3)
-    puma (4.3.5)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-test (1.1.0)