Gemfile.lock in rcmd-1.6.2 vs Gemfile.lock in rcmd-1.6.3

@@ -1,40 +1,37 @@
 PATH
   remote: .
   specs:
     rcmd (1.6.2)
-      activerecord (= 4.2.6)
-      activesupport (= 4.2.6)
+      activerecord
+      activesupport
       io-console
       net-ssh
       regexp-examples
       thread
       tty-prompt
 
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (4.2.6)
-      activesupport (= 4.2.6)
-      builder (~> 3.1)
-    activerecord (4.2.6)
-      activemodel (= 4.2.6)
-      activesupport (= 4.2.6)
-      arel (~> 6.0)
-    activesupport (4.2.6)
+    activemodel (5.1.4)
+      activesupport (= 5.1.4)
+    activerecord (5.1.4)
+      activemodel (= 5.1.4)
+      activesupport (= 5.1.4)
+      arel (~> 8.0)
+    activesupport (5.1.4)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    arel (6.0.4)
-    builder (3.2.3)
+    arel (8.0.0)
+    concurrent-ruby (1.0.5)
     diff-lcs (1.3)
     equatable (0.5.0)
     hitimes (1.2.6)
     i18n (0.8.6)
     io-console (0.4.6)
-    json (1.8.6)
     minitest (5.10.3)
     necromancer (0.4.0)
     net-ssh (4.2.0)
     pastel (0.7.1)
       equatable (~> 0.5.0)