diff --git a/Gemfile.lock b/Gemfile.lock
index 42854c2..d4fc409 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,30 +1,31 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (5.1.2)
-      activesupport (= 5.1.2)
-    activerecord (5.1.2)
-      activemodel (= 5.1.2)
-      activesupport (= 5.1.2)
-      arel (~> 8.0)
-    activesupport (5.1.2)
+    activemodel (5.2.8.1)
+      activesupport (= 5.2.8.1)
+    activerecord (5.2.8.1)
+      activemodel (= 5.2.8.1)
+      activesupport (= 5.2.8.1)
+      arel (>= 9.0)
+    activesupport (5.2.8.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (~> 0.7)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    arel (8.0.0)
+    arel (9.0.0)
     coderay (1.1.1)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.10)
     domain_name (0.5.20170223)
       unf (>= 0.0.5, < 1.0.0)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (0.8.6)
+    i18n (1.11.0)
+      concurrent-ruby (~> 1.0)
     method_source (0.8.2)
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    minitest (5.10.2)
+    minitest (5.16.2)
     mustermann (1.0.0)
     netrc (0.11.0)
     pry (0.10.4)
@@ -54,7 +55,7 @@ GEM
     sqlite3 (1.3.13)
     thread_safe (0.3.6)
     tilt (2.0.7)
-    tzinfo (1.2.3)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext