diff --git a/phpBB/styles/prosilver/template/mcp_ban.html b/phpBB/styles/prosilver/template/mcp_ban.html
index f6e4620ad8..d953f1039f 100644
--- a/phpBB/styles/prosilver/template/mcp_ban.html
+++ b/phpBB/styles/prosilver/template/mcp_ban.html
@@ -11,10 +11,10 @@
 	<!-- BEGIN bans -->
 		ban_length['{bans.BAN_ID}'] = '{bans.A_LENGTH}';
 		<!-- IF bans.A_REASON -->
-			ban_reason['{bans.BAN_ID}'] = '{bans.A_REASON}';
+			ban_reason['{bans.BAN_ID}'] = '{{ bans.A_REASON | e('js') }}';
 		<!-- ENDIF -->
 		<!-- IF bans.A_GIVE_REASON -->
-			ban_give_reason['{bans.BAN_ID}'] = '{bans.A_GIVE_REASON}';
+			ban_give_reason['{bans.BAN_ID}'] = '{{ bans.A_GIVE_REASON | e('js') }}';
 		<!-- ENDIF -->
 	<!-- END bans -->