diff --git a/app/Models/ContentHistory.php b/app/Models/ContentHistory.php
index 5dd46610..14dbd1a9 100644
--- a/app/Models/ContentHistory.php
+++ b/app/Models/ContentHistory.php
@@ -95,6 +95,6 @@ class ContentHistory extends Model
 
     public function getDiff($change)
     {
-        return Differ::htmlDiff($change->old_value, $change->new_value);
+        return Differ::htmlDiff(e($change->old_value), e($change->new_value));
     }
 }
\ No newline at end of file