diff --git a/docs/Gemfile b/docs/Gemfile
index f144584eff3..053b94abd6d 100644
--- a/docs/Gemfile
+++ b/docs/Gemfile
@@ -17,7 +17,7 @@ gem 'json'
 gem 'rb-fsevent'
 
 # For markdown header cleanup
-gem 'sanitize', '~>2.0'
+gem 'sanitize', '~> 7.0', '>= 7.0.0'
 
 # Markdown
 gem 'redcarpet'