diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 58b2529..4335856 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -249,6 +249,7 @@
       unf_ext
     unf_ext (0.0.8.2)
     unicode-display_width (1.8.0)
+    webrick (1.8.1)
 
 PLATFORMS
   ruby
@@ -257,6 +258,7 @@
   github-pages
   jemoji (~> 0.12.0)
   tzinfo-data
+  webrick (~> 1.8)
 
 BUNDLED WITH
    1.17.2