diff --git a/Gemfile b/Gemfile
index 56dcbe6d..2ec4f355 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,4 +24,4 @@ gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
 # do not have a Java counterpart.
 gem "http_parser.rb", "~> 0.6.0", :platforms => [:jruby]
 
-gem "webrick", "~> 1.8"
+gem "webrick", "~> 1.9"
diff --git a/Gemfile.lock b/Gemfile.lock
index fc81e16e..236ce39d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -262,7 +262,7 @@ GEM
     unf_ext (0.0.9.1)
     unicode-display_width (1.8.0)
     uri (0.13.0)
-    webrick (1.8.1)
+    webrick (1.9.1)
 
 PLATFORMS
   aarch64-linux
@@ -283,7 +283,7 @@ DEPENDENCIES
   tzinfo (>= 1, < 3)
   tzinfo-data
   wdm (~> 0.1.1)
-  webrick (~> 1.8)
+  webrick (~> 1.9)
 
 BUNDLED WITH
    2.5.6