diff --git a/2019/s4/aspost/Gemfile.lock b/2019/s4/aspost/Gemfile.lock
index c8382a3..250cd97 100644
--- a/2019/s4/aspost/Gemfile.lock
+++ b/2019/s4/aspost/Gemfile.lock
@@ -73,13 +73,13 @@ GEM
       xpath (~> 3.2)
     childprocess (2.0.0)
       rake (< 13.0)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.10)
     crass (1.0.4)
     erubi (1.8.0)
     ffi (1.11.1)
-    globalid (0.4.2)
-      activesupport (>= 4.2.0)
-    i18n (1.6.0)
+    globalid (1.0.1)
+      activesupport (>= 5.0)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     jbuilder (2.9.1)
       activesupport (>= 4.2.0)
@@ -98,7 +98,7 @@ GEM
     mimemagic (0.3.3)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
-    minitest (5.11.3)
+    minitest (5.17.0)
     msgpack (1.3.1)
     nio4r (2.5.1)
     nokogiri (1.10.4)
@@ -176,7 +176,7 @@ GEM
     turbolinks (5.2.0)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     web-console (4.0.1)
       actionview (>= 6.0.0)
@@ -196,7 +196,7 @@ GEM
     websocket-extensions (0.1.4)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.1.10)
+    zeitwerk (2.6.6)
 
 PLATFORMS
   ruby