diff --git a/db-migration/Gemfile.lock b/db-migration/Gemfile.lock
index 86257be..9d9c7f6 100644
--- a/db-migration/Gemfile.lock
+++ b/db-migration/Gemfile.lock
@@ -33,11 +33,13 @@ GEM
     i18n (0.8.6)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
-    mini_portile2 (2.2.0)
+    mini_portile2 (2.5.1)
     minitest (5.10.3)
-    nokogiri (1.8.0)
-      mini_portile2 (~> 2.2.0)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     pg (0.21.0)
+    racc (1.5.2)
     rack (1.6.8)
     rack-protection (1.5.3)
       rack