diff --git a/libs/web/luasrc/dispatcher.lua b/libs/web/luasrc/dispatcher.lua
index 83ce52cbfe..fd864698dd 100644
--- a/libs/web/luasrc/dispatcher.lua
+++ b/libs/web/luasrc/dispatcher.lua
@@ -61,7 +61,7 @@ function build_url(...)
 
 	local p
 	for _, p in ipairs(path) do
-		if p:match("^[a-zA-Z0-9_%-%./,;]+$") then
+		if p:match("^[a-zA-Z0-9_%-%.%%/,;]+$") then
 			url[#url+1] = "/"
 			url[#url+1] = p
 		end