diff --git a/Gemfile.lock b/Gemfile.lock
index b1d9379..8f1acdc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -130,7 +130,7 @@ GEM
     html-pipeline (2.14.3)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    html-proofer (5.2.0)
+    html-proofer (5.2.1)
       addressable (~> 2.3)
       async (~> 2.1)
       benchmark (~> 0.5)