diff --git a/Gemfile.lock b/Gemfile.lock
index 64f5db4..5c1fa50 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,11 +7,13 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.6.2)
+    json (2.19.3)
     rake (13.3.1)
     rake-compiler (1.3.1)
       rake
     rake-compiler-dock (1.11.0)
-    rb_sys (0.9.124)
+    rb_sys (0.9.126)
+      json (>= 2)
       rake-compiler-dock (= 1.11.0)
     rspec (3.13.2)
       rspec-core (~> 3.13.0)