diff --git a/day-04/bg-lib/Gemfile.lock b/day-04/bg-lib/Gemfile.lock
index 759c833..8cad4d1 100644
--- a/day-04/bg-lib/Gemfile.lock
+++ b/day-04/bg-lib/Gemfile.lock
@@ -69,7 +69,7 @@ GEM
       nokogiri (~> 1.8)
     coderay (1.1.2)
     concurrent-ruby (1.1.5)
-    crass (1.0.4)
+    crass (1.0.5)
     docile (1.3.2)
     erubi (1.8.0)
     execjs (2.7.0)
@@ -110,7 +110,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.2.3)
+    loofah (2.3.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.13)
@@ -127,7 +127,7 @@ GEM
     msgpack (1.3.1)
     nenv (0.3.0)
     nio4r (2.4.0)
-    nokogiri (1.10.4)
+    nokogiri (1.10.5)
       mini_portile2 (~> 2.4.0)
     notiffany (0.1.3)
       nenv (~> 0.1)