diff --git a/Gemfile b/Gemfile
index 911080d..72a3bd8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,3 +14,5 @@ gem "nokogiri", ">= 1.11.0.rc4"
 
 # security vulnerability - https://github.com/advisories/GHSA-jxhc-q857-3j6g
 gem "addressable", ">= 2.8.0"
+
+gem "webrick", "~> 1.8"
diff --git a/Gemfile.lock b/Gemfile.lock
index ad199b9..1791438 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -251,6 +251,7 @@ GEM
       unf_ext
     unf_ext (0.0.8.2)
     unicode-display_width (1.8.0)
+    webrick (1.8.1)
 
 PLATFORMS
   ruby
@@ -262,6 +263,7 @@ DEPENDENCIES
   kramdown (>= 2.3.1)
   nokogiri (>= 1.11.0.rc4)
   tzinfo-data
+  webrick (~> 1.8)
 
 BUNDLED WITH
    2.4.5