diff --git a/appengine/rails-hello_world/Gemfile.lock b/appengine/rails-hello_world/Gemfile.lock
index 18f3197ea..618dc5d77 100644
--- a/appengine/rails-hello_world/Gemfile.lock
+++ b/appengine/rails-hello_world/Gemfile.lock
@@ -97,7 +97,7 @@ GEM
       xpath (~> 3.2)
     concurrent-ruby (1.3.5)
     connection_pool (2.5.3)
-    crass (1.0.6)
+    crass (1.0.7)
     date (3.3.4)
     diff-lcs (1.5.0)
     drb (2.2.3)
@@ -120,7 +120,7 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     logger (1.7.0)
-    loofah (2.23.1)
+    loofah (2.25.2)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     mail (2.8.1)
@@ -144,7 +144,7 @@ GEM
     net-smtp (0.4.0.1)
       net-protocol
     nio4r (2.7.0)
-    nokogiri (1.18.9)
+    nokogiri (1.19.4)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     pp (0.6.2)