diff --git a/Gemfile b/Gemfile
index e7c70a81..c9a1add1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -50,5 +50,5 @@ gem 'sinatra', '4.0.0'
 gem 'sinatra-contrib', '4.0.0'
 gem 'sprockets', '4.2.1'
 gem 'test-unit', '3.6.4', require: false
-gem 'webrick', '1.9.0'
+gem 'webrick', '1.9.1'
 gem 'xcop', '0.7.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index d97b6652..8aa3c0a3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -225,7 +225,7 @@ GEM
     unicode-display_width (2.6.0)
     uri (0.13.1)
     version_gem (1.1.3)
-    webrick (1.9.0)
+    webrick (1.9.1)
     xcop (0.7.1)
       differ (~> 0.1.2)
       nokogiri (~> 1.10)
@@ -270,7 +270,7 @@ DEPENDENCIES
   sinatra-contrib (= 4.0.0)
   sprockets (= 4.2.1)
   test-unit (= 3.6.4)
-  webrick (= 1.9.0)
+  webrick (= 1.9.1)
   xcop (= 0.7.1)
 
 BUNDLED WITH