diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 948d3d70ed..a880ab82cb 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -84,7 +84,7 @@ GEM
     html-pipeline (2.14.0)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    html-proofer (3.17.4)
+    html-proofer (3.18.0)
       addressable (~> 2.3)
       mercenary (~> 0.3)
       nokogumbo (~> 2.0)