diff --git a/Gemfile.lock b/Gemfile.lock
index 77e57a6..2b89125 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
       simplecov (<= 0.13)
     diff-lcs (1.2.5)
     docile (1.1.5)
-    json (2.2.0)
+    json (2.3.1)
     rake (13.0.0)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)