diff --git a/Gemfile.lock b/Gemfile.lock
index 50196d8d59b..a29850f0194 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -156,7 +156,6 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (2.3.0)
     jwt (2.2.1)
     kgio (2.11.3)
     libv8 (7.3.492.27.1)
@@ -386,11 +385,10 @@ GEM
       rack (>= 2.0.0)
       rack-protection (>= 2.0.0)
       redis (>= 4.1.0)
-    simplecov (0.17.1)
+    simplecov (0.18.0)
       docile (~> 1.1)
-      json (>= 1.8, < 3)
-      simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.2)
+      simplecov-html (~> 0.11.0)
+    simplecov-html (0.11.0)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)