diff --git a/db-migration/Gemfile b/db-migration/Gemfile
index 050e4dc..8132039 100644
--- a/db-migration/Gemfile
+++ b/db-migration/Gemfile
@@ -1,8 +1,8 @@
 
 source 'https://rubygems.org'
 
-gem 'actionpack', '~> 4.2'
-gem 'activerecord', '~> 4.2'
+gem 'actionpack', '~> 6.1'
+gem 'activerecord', '~> 6.1'
 gem 'pg', '~> 0.18'
 gem 'sinatra-activerecord', '~> 2.0'
 
diff --git a/db-migration/Gemfile.lock b/db-migration/Gemfile.lock
index 86257be..36e5ffe 100644
--- a/db-migration/Gemfile.lock
+++ b/db-migration/Gemfile.lock
@@ -1,75 +1,80 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actionpack (4.2.9)
-      actionview (= 4.2.9)
-      activesupport (= 4.2.9)
-      rack (~> 1.6)
-      rack-test (~> 0.6.2)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (4.2.9)
-      activesupport (= 4.2.9)
+    actionpack (6.1.3.2)
+      actionview (= 6.1.3.2)
+      activesupport (= 6.1.3.2)
+      rack (~> 2.0, >= 2.0.9)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+    actionview (6.1.3.2)
+      activesupport (= 6.1.3.2)
       builder (~> 3.1)
-      erubis (~> 2.7.0)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activemodel (4.2.9)
-      activesupport (= 4.2.9)
-      builder (~> 3.1)
-    activerecord (4.2.9)
-      activemodel (= 4.2.9)
-      activesupport (= 4.2.9)
-      arel (~> 6.0)
-    activesupport (4.2.9)
-      i18n (~> 0.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
-      tzinfo (~> 1.1)
-    arel (6.0.4)
-    builder (3.2.3)
+      erubi (~> 1.4)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activemodel (6.1.3.2)
+      activesupport (= 6.1.3.2)
+    activerecord (6.1.3.2)
+      activemodel (= 6.1.3.2)
+      activesupport (= 6.1.3.2)
+    activesupport (6.1.3.2)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
+    builder (3.2.4)
     byebug (8.2.5)
-    erubis (2.7.0)
-    i18n (0.8.6)
-    loofah (2.0.3)
+    concurrent-ruby (1.1.8)
+    crass (1.0.6)
+    erubi (1.10.0)
+    i18n (1.8.10)
+      concurrent-ruby (~> 1.0)
+    loofah (2.9.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mini_portile2 (2.2.0)
-    minitest (5.10.3)
-    nokogiri (1.8.0)
-      mini_portile2 (~> 2.2.0)
+    mini_portile2 (2.5.1)
+    minitest (5.14.4)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
+    nokogiri (1.11.3)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     pg (0.21.0)
-    rack (1.6.8)
-    rack-protection (1.5.3)
+    racc (1.5.2)
+    rack (2.2.3)
+    rack-protection (2.1.0)
       rack
-    rack-test (0.6.3)
-      rack (>= 1.0)
-    rails-deprecated_sanitizer (1.0.3)
-      activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.8)
-      activesupport (>= 4.2.0.beta, < 5.0)
-      nokogiri (~> 1.6)
-      rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rack-test (1.1.0)
+      rack (>= 1.0, < 3)
+    rails-dom-testing (2.0.3)
+      activesupport (>= 4.2.0)
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.3.0)
+      loofah (~> 2.3)
     rake (11.3.0)
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
+    ruby2_keywords (0.0.4)
+    sinatra (2.1.0)
+      mustermann (~> 1.0)
+      rack (~> 2.2)
+      rack-protection (= 2.1.0)
+      tilt (~> 2.0)
     sinatra-activerecord (2.0.13)
       activerecord (>= 3.2)
       sinatra (>= 1.0)
-    thread_safe (0.3.6)
-    tilt (2.0.8)
-    tzinfo (1.2.3)
-      thread_safe (~> 0.1)
+    tilt (2.0.10)
+    tzinfo (2.0.4)
+      concurrent-ruby (~> 1.0)
+    zeitwerk (2.4.2)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  actionpack (~> 4.2)
-  activerecord (~> 4.2)
+  actionpack (~> 6.1)
+  activerecord (~> 6.1)
   byebug (~> 8.2)
   pg (~> 0.18)
   rake (~> 11.1)