diff --git a/Gemfile.lock b/Gemfile.lock
index 8cff1be..8914d4f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -153,6 +153,7 @@ GEM
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
+    json (2.6.2)
     kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
@@ -214,7 +215,8 @@ GEM
     regexp_parser (2.5.0)
     rexml (3.2.5)
     rouge (3.29.0)
-    rubocop (1.30.1)
+    rubocop (1.31.1)
+      json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.1.0.0)
       rainbow (>= 2.2.2, < 4.0)