diff --git a/Gemfile.lock b/Gemfile.lock
index 81dc1383a6..602bf8ef1f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,7 +44,7 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    test-unit (3.4.0)
+    test-unit (3.4.1)
       power_assert
     timecop (0.9.4)
     unicode-display_width (2.0.0)
@@ -60,7 +60,7 @@ DEPENDENCIES
   rake (= 13.0.3)
   rubocop (= 1.13.0)
   simplecov (= 0.17.1, < 0.18)
-  test-unit (= 3.4.0)
+  test-unit (= 3.4.1)
   timecop (= 0.9.4)
   yard (= 0.9.26)
 
diff --git a/faker.gemspec b/faker.gemspec
index bb9dc1d75e..c9837534a2 100644
--- a/faker.gemspec
+++ b/faker.gemspec
@@ -37,7 +37,7 @@ Gem::Specification.new do |spec|
   # Stop upgrading SimpleCov until the following issue will be resolved.
   # https://github.com/codeclimate/test-reporter/issues/418
   spec.add_development_dependency('simplecov', '0.17.1', '< 0.18')
-  spec.add_development_dependency('test-unit', '3.4.0')
+  spec.add_development_dependency('test-unit', '3.4.1')
   spec.add_development_dependency('timecop', '0.9.4')
   spec.add_development_dependency('yard', '0.9.26')
 end