diff --git a/2019/s4/aspost/Gemfile.lock b/2019/s4/aspost/Gemfile.lock
index c8382a3..6117dea 100644
--- a/2019/s4/aspost/Gemfile.lock
+++ b/2019/s4/aspost/Gemfile.lock
@@ -97,15 +97,17 @@ GEM
     method_source (0.9.2)
     mimemagic (0.3.3)
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.8.0)
     minitest (5.11.3)
     msgpack (1.3.1)
     nio4r (2.5.1)
-    nokogiri (1.10.4)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     pg (1.1.4)
     public_suffix (4.0.1)
     puma (3.12.1)
+    racc (1.6.0)
     rack (2.0.7)
     rack-proxy (0.6.5)
       rack