diff --git a/Gemfile.lock b/Gemfile.lock
index 659e5ff..162e0d6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     docile (1.3.2)
-    json (2.2.0)
+    json (2.3.1)
     power_assert (1.1.5)
     rake (13.0.0)
     simplecov (0.17.1)