diff --git a/Gemfile b/Gemfile
index 7e604be5..b9ca680b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,7 +23,7 @@ gem "kramdown-parser-gfm"
 gem "mini_magick"
 gem "rake"
 gem "rouge"
-gem "sanitize"
+gem "sanitize", ">= 7.0.0"
 gem "sass"
 gem "sprockets", "4.0.0.beta8"
 gem "uglifier"
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