diff --git a/Gemfile b/Gemfile
index 8312e19..31181ff 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,4 +7,5 @@ gemspec
 gem 'debug', '>= 1.0'
 gem 'parlour'
 gem 'reek'
+gem 'simplecov_json_formatter'
 gem 'tapioca', '~> 0.10.3'
diff --git a/Gemfile.lock b/Gemfile.lock
index 27ffbc3..ecb31f6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -144,6 +144,7 @@ DEPENDENCIES
   rubocop-rspec (~> 2.14.2)
   rubocop-sorbet (~> 0.6.11)
   simplecov
+  simplecov_json_formatter
   sorbet
   tapioca (~> 0.10.3)
   timecop
diff --git a/gemfiles/rbnacl.gemfile b/gemfiles/rbnacl.gemfile
index fc892ae..22aad2e 100644
--- a/gemfiles/rbnacl.gemfile
+++ b/gemfiles/rbnacl.gemfile
@@ -3,6 +3,7 @@
 source "https://rubygems.org"
 
 gem "debug", ">= 1.0"
+gem "simplecov_json_formatter"
 gem "tapioca", "~> 0.10.3"
 gem "rbnacl", "~> 7.1.1"
 
diff --git a/gemfiles/rbnacl.gemfile.lock b/gemfiles/rbnacl.gemfile.lock
index 99fb4de..885b494 100644
--- a/gemfiles/rbnacl.gemfile.lock
+++ b/gemfiles/rbnacl.gemfile.lock
@@ -133,6 +133,7 @@ DEPENDENCIES
   rubocop-rspec (~> 2.14.2)
   rubocop-sorbet (~> 0.6.11)
   simplecov
+  simplecov_json_formatter
   sorbet
   tapioca (~> 0.10.3)
   timecop
diff --git a/gemfiles/standalone.gemfile b/gemfiles/standalone.gemfile
index eb3b42a..6adc99b 100644
--- a/gemfiles/standalone.gemfile
+++ b/gemfiles/standalone.gemfile
@@ -3,6 +3,7 @@
 source "https://rubygems.org"
 
 gem "debug", ">= 1.0"
+gem "simplecov_json_formatter"
 gem "tapioca", "~> 0.10.3"
 
 gemspec path: "../"
diff --git a/gemfiles/standalone.gemfile.lock b/gemfiles/standalone.gemfile.lock
index 2106889..7efe819 100644
--- a/gemfiles/standalone.gemfile.lock
+++ b/gemfiles/standalone.gemfile.lock
@@ -129,6 +129,7 @@ DEPENDENCIES
   rubocop-rspec (~> 2.14.2)
   rubocop-sorbet (~> 0.6.11)
   simplecov
+  simplecov_json_formatter
   sorbet
   tapioca (~> 0.10.3)
   timecop