diff --git a/Gemfile b/Gemfile
index 9b0512ad6a234..6d81e06c1ef44 100644
--- a/Gemfile
+++ b/Gemfile
@@ -156,7 +156,7 @@ group :test do
   gem "rspec-retry", "~> 0.6" # retry intermittently failing rspec examples
   gem "ruby-prof", "~> 1.4", require: false # ruby-prof is a fast code profiler for Ruby
   gem "shoulda-matchers", "~> 4.4.1", require: false # Simple one-liner tests for common Rails functionality
-  gem "simplecov", "0.17.1", require: false # Code coverage with a powerful configuration library and automatic merging of coverage across test suites
+  gem "simplecov", "0.21.2", require: false # Code coverage with a powerful configuration library and automatic merging of coverage across test suites
   gem "stackprof", "~> 0.2", require: false, platforms: :ruby # stackprof is a fast sampling profiler for ruby code, with cpu, wallclock and object allocation samplers
   gem "stripe-ruby-mock", "~> 3.0", require: "stripe_mock" # A drop-in library to test stripe without hitting their servers
   gem "test-prof", "~> 0.12" # Ruby Tests Profiling Toolbox
diff --git a/Gemfile.lock b/Gemfile.lock
index 3f5909f4d43c2..9908f44d1de86 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -216,7 +216,7 @@ GEM
       devise (>= 4.6)
     diff-lcs (1.3)
     distribution (0.8.0)
-    docile (1.3.2)
+    docile (1.3.4)
     dogstatsd-ruby (4.8.2)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
@@ -394,7 +394,7 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (2.3.1)
+    json (2.5.1)
     jsonapi-serializer (2.1.0)
       activesupport (>= 4.2)
     jwt (2.2.2)
@@ -703,11 +703,12 @@ GEM
       sidekiq (>= 4.0, < 7.0)
       thor (>= 0.20, < 2.0)
     simple_oauth (0.3.1)
-    simplecov (0.17.1)
+    simplecov (0.21.2)
       docile (~> 1.1)
-      json (>= 1.8, < 3)
-      simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.2)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.2)
     sitemap_generator (6.1.2)
       builder (~> 3.0)
     slack-notifier (2.3.2)
@@ -935,7 +936,7 @@ DEPENDENCIES
   sidekiq (~> 6.1.2)
   sidekiq-cron (~> 1.1)
   sidekiq-unique-jobs (~> 6.0.25)
-  simplecov (= 0.17.1)
+  simplecov (= 0.21.2)
   sitemap_generator (~> 6.1)
   slack-notifier (~> 2.3)
   spring (~> 2.1)
diff --git a/vendor/cache/docile-1.3.2.gem b/vendor/cache/docile-1.3.2.gem
deleted file mode 100644
index fa35a71e7a0f4..0000000000000
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diff --git a/vendor/cache/docile-1.3.4.gem b/vendor/cache/docile-1.3.4.gem
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index 0000000000000..57b96c01459c6
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diff --git a/vendor/cache/json-2.3.1.gem b/vendor/cache/json-2.3.1.gem
deleted file mode 100644
index 1f8963309689f..0000000000000
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diff --git a/vendor/cache/json-2.5.1.gem b/vendor/cache/json-2.5.1.gem
new file mode 100644
index 0000000000000..dc2477a169496
Binary files /dev/null and b/vendor/cache/json-2.5.1.gem differ
diff --git a/vendor/cache/simplecov-0.17.1.gem b/vendor/cache/simplecov-0.17.1.gem
deleted file mode 100644
index cafc6cded832f..0000000000000
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diff --git a/vendor/cache/simplecov-0.21.2.gem b/vendor/cache/simplecov-0.21.2.gem
new file mode 100644
index 0000000000000..711153d14e241
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diff --git a/vendor/cache/simplecov-html-0.10.2.gem b/vendor/cache/simplecov-html-0.10.2.gem
deleted file mode 100644
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diff --git a/vendor/cache/simplecov-html-0.12.3.gem b/vendor/cache/simplecov-html-0.12.3.gem
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index 0000000000000..003d7ca49acbb
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diff --git a/vendor/cache/simplecov_json_formatter-0.1.2.gem b/vendor/cache/simplecov_json_formatter-0.1.2.gem
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index 0000000000000..018214257e0e4
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