diff --git a/Gemfile b/Gemfile
index 01b675d..1395a08 100644
--- a/Gemfile
+++ b/Gemfile
@@ -37,7 +37,7 @@ end
 
 group :development, :docs do
   gem 'commonmarker', '~> 0.23' # for markdown support in YARD
-  gem 'webrick', '~> 1.8', '>= 1.8.1' # for yard server
+  gem 'webrick', '~> 1.8' # for yard server
   gem 'yard', ['>= 0.9.27', '< 0.10']
   gem 'yard-coderay', '~> 0.1' # for syntax highlight support in YARD
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 440ffb5..4b6da08 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -62,7 +62,7 @@ GEM
     unicode-confusable (1.10.0)
     unicode-display_width (2.5.0)
     uri (0.13.0)
-    webrick (1.8.1)
+    webrick (1.8.2)
     yard (0.9.36)
     yard-coderay (0.1.0)
       coderay
@@ -84,7 +84,7 @@ DEPENDENCIES
   twitter_cldr (~> 6.12)
   unicode-confusable (~> 1.10)
   unisec!
-  webrick (~> 1.8, >= 1.8.1)
+  webrick (~> 1.8)
   yard (>= 0.9.27, < 0.10)
   yard-coderay (~> 0.1)