diff --git a/examples/rails6/test-emd/Gemfile.lock b/examples/rails6/test-emd/Gemfile.lock
index 043a442..b20ddfe 100644
--- a/examples/rails6/test-emd/Gemfile.lock
+++ b/examples/rails6/test-emd/Gemfile.lock
@@ -103,9 +103,9 @@ GEM
     minitest (5.14.4)
     msgpack (1.4.2)
     nio4r (2.5.8)
-    nokogiri (1.12.5-x86_64-darwin)
+    nokogiri (1.13.4-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.12.5-x86_64-linux)
+    nokogiri (1.13.4-x86_64-linux)
       racc (~> 1.4)
     public_suffix (4.0.6)
     puma (5.5.1)