diff --git a/Gemfile b/Gemfile
index 55448123..9c0c3926 100644
--- a/Gemfile
+++ b/Gemfile
@@ -37,7 +37,7 @@ gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw jruby]
 
 group :test do
   gem 'codecov', '~> 0.6.0', require: false
-  gem 'mocha', '~> 2.4.2', require: false
+  gem 'mocha', '~> 2.4.5', require: false
   gem 'simplecov', '~> 0.21', require: false
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 34f13d19..16e6de34 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -155,7 +155,7 @@ GEM
     mini_mime (1.1.5)
     mini_portile2 (2.8.7)
     minitest (5.24.1)
-    mocha (2.4.2)
+    mocha (2.4.5)
       ruby2_keywords (>= 0.0.5)
     msgpack (1.7.2)
     mutex_m (0.2.0)
@@ -305,7 +305,7 @@ DEPENDENCIES
   good_job (~> 4.1)
   has_scope (~> 0.8)
   image_processing (~> 1.12.2)
-  mocha (~> 2.4.2)
+  mocha (~> 2.4.5)
   pg (>= 1.2.3, < 2.0)
   puma (~> 6.4)
   pundit (~> 2.3)