diff --git a/Client/mods/deathmatch/logic/luadefs/CLuaBrowserDefs.cpp b/Client/mods/deathmatch/logic/luadefs/CLuaBrowserDefs.cpp
index c496fca0cd..1e2928c87d 100644
--- a/Client/mods/deathmatch/logic/luadefs/CLuaBrowserDefs.cpp
+++ b/Client/mods/deathmatch/logic/luadefs/CLuaBrowserDefs.cpp
@@ -11,6 +11,7 @@
 
 #include "StdInc.h"
 #include "lua/CLuaFunctionParser.h"
+#include <regex>
 
 void CLuaBrowserDefs::LoadFunctions()
 {
@@ -182,8 +183,12 @@ int CLuaBrowserDefs::RequestBrowserDomains(lua_State* luaVM)
 
     if (!argStream.HasErrors())
     {
-        // Remove empty URLs
-        pages.erase(std::remove_if(pages.begin(), pages.end(), [](const auto& url) { return url.empty(); }), pages.end());
+        // Remove empty and invalid URLs
+        std::regex invalidSynmbolsRegex("[^A-Za-z0-9\-._~!#$&'()*+,;=:@\/?%]");
+
+        pages.erase(std::remove_if(pages.begin(), pages.end(),
+                                   [&invalidSynmbolsRegex](const auto& url) { return url.empty() || std::regex_search(url, invalidSynmbolsRegex); }),
+                    pages.end());
 
         // Convert to domains if we got a list of URLs
         if (bIsURL)