diff --git a/Gemfile b/Gemfile
index ca77e25487..e4a915de15 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,6 @@
 source 'https://rubygems.org'
 
 gem 'rake'
-gem 'yard', "~> 0.9.38"
+gem 'yard', "~> 0.9.39"
 gem 'yard-coderay'
 gem 'yard-mruby'
diff --git a/Gemfile.lock b/Gemfile.lock
index 89cf0d0bec..757180b49e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     coderay (1.1.3)
     rake (13.3.1)
-    yard (0.9.38)
+    yard (0.9.39)
     yard-coderay (0.1.0)
       coderay
       yard
@@ -17,7 +17,7 @@ PLATFORMS
 
 DEPENDENCIES
   rake
-  yard (~> 0.9.38)
+  yard (~> 0.9.39)
   yard-coderay
   yard-mruby