diff --git a/Gemfile b/Gemfile
index d585f2d254..630b9e5377 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,7 +16,7 @@ gem 'rubocop-rake', '0.7.1'
 gem 'simplecov', '0.22.0'
 gem 'test-unit', '3.7.7'
 gem 'timecop', '0.9.11'
-gem 'yard', '0.9.40'
+gem 'yard', '0.9.42'
 
 group :benchmark do
   gem 'benchmark'
diff --git a/Gemfile.lock b/Gemfile.lock
index 5ab438f6f2..864a68d97c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,7 @@ GEM
     unicode-display_width (3.2.0)
       unicode-emoji (~> 4.1)
     unicode-emoji (4.2.0)
-    yard (0.9.40)
+    yard (0.9.42)
 
 PLATFORMS
   arm64-darwin
@@ -113,7 +113,7 @@ DEPENDENCIES
   simplecov (= 0.22.0)
   test-unit (= 3.7.7)
   timecop (= 0.9.11)
-  yard (= 0.9.40)
+  yard (= 0.9.42)
 
 BUNDLED WITH
   4.0.6