diff --git a/components/lua/scriptscontainer.cpp b/components/lua/scriptscontainer.cpp
index f4922a8b6b..c92116f1d9 100644
--- a/components/lua/scriptscontainer.cpp
+++ b/components/lua/scriptscontainer.cpp
@@ -15,9 +15,6 @@ namespace LuaUtil
     static constexpr std::string_view HANDLER_LOAD = "onLoad";
     static constexpr std::string_view HANDLER_INTERFACE_OVERRIDE = "onInterfaceOverride";
 
-    static constexpr std::string_view REGISTERED_TIMER_CALLBACKS = "_timers";
-    static constexpr std::string_view TEMPORARY_TIMER_CALLBACKS = "_temp_timers";
-
     std::string ScriptsContainer::ScriptId::toString() const
     {
         std::string res = mContainer->mNamePrefix;
@@ -78,8 +75,6 @@ namespace LuaUtil
             Script& script = mScripts[scriptId];
             script.mHiddenData = mLua.newTable();
             script.mHiddenData[ScriptId::KEY] = ScriptId{this, scriptId, path};
-            script.mHiddenData[REGISTERED_TIMER_CALLBACKS] = mLua.newTable();
-            script.mHiddenData[TEMPORARY_TIMER_CALLBACKS] = mLua.newTable();
             sol::object scriptOutput = mLua.runInNewSandbox(path, mNamePrefix, mAPI, script.mHiddenData);
             if (scriptOutput == sol::nil)
                 return true;
@@ -449,17 +444,17 @@ namespace LuaUtil
         mPublicInterfaces[sol::meta_function::index] = mPublicInterfaces;
     }
 
-    sol::table ScriptsContainer::getHiddenData(int scriptId)
+    ScriptsContainer::Script& ScriptsContainer::getScript(int scriptId)
     {
         auto it = mScripts.find(scriptId);
         if (it == mScripts.end())
-            throw std::logic_error("ScriptsContainer::getHiddenData: script doesn't exist");
-        return it->second.mHiddenData;
+            throw std::logic_error("Script doesn't exist");
+        return it->second;
     }
 
     void ScriptsContainer::registerTimerCallback(int scriptId, std::string_view callbackName, sol::function callback)
     {
-        getHiddenData(scriptId)[REGISTERED_TIMER_CALLBACKS][callbackName] = std::move(callback);
+        getScript(scriptId).mRegisteredCallbacks.emplace(std::string(callbackName), std::move(callback));
     }
 
     void ScriptsContainer::insertTimer(std::vector<Timer>& timerQueue, Timer&& t)
@@ -489,7 +484,7 @@ namespace LuaUtil
         t.mTime = time;
 
         t.mCallback = mTemporaryCallbackCounter;
-        getHiddenData(scriptId)[TEMPORARY_TIMER_CALLBACKS][mTemporaryCallbackCounter] = std::move(callback);
+        getScript(t.mScriptId).mTemporaryCallbacks.emplace(mTemporaryCallbackCounter, std::move(callback));
         mTemporaryCallbackCounter++;
 
         insertTimer(timeUnit == TimeUnit::HOURS ? mHoursTimersQueue : mSecondsTimersQueue, std::move(t));
@@ -499,24 +494,20 @@ namespace LuaUtil
     {
         try
         {
-            sol::table data = getHiddenData(t.mScriptId);
+            Script& script = getScript(t.mScriptId);
             if (t.mSerializable)
             {
                 const std::string& callbackName = std::get<std::string>(t.mCallback);
-                sol::object callback = data[REGISTERED_TIMER_CALLBACKS][callbackName];
-                if (!callback.is<sol::function>())
+                auto it = script.mRegisteredCallbacks.find(callbackName);
+                if (it == script.mRegisteredCallbacks.end())
                     throw std::logic_error("Callback '" + callbackName + "' doesn't exist");
-                LuaUtil::call(callback, t.mArg);
+                LuaUtil::call(it->second, t.mArg);
             }
             else
             {
                 int64_t id = std::get<int64_t>(t.mCallback);
-                sol::table callbacks = data[TEMPORARY_TIMER_CALLBACKS];
-                sol::object callback = callbacks[id];
-                if (!callback.is<sol::function>())
-                    throw std::logic_error("Temporary timer callback doesn't exist");
-                LuaUtil::call(callback);
-                callbacks[id] = sol::nil;
+                LuaUtil::call(script.mTemporaryCallbacks.at(id));
+                script.mTemporaryCallbacks.erase(id);
             }
         }
         catch (std::exception& e) { printError(t.mScriptId, "callTimer failed", e); }
diff --git a/components/lua/scriptscontainer.hpp b/components/lua/scriptscontainer.hpp
index 184072eef1..b25c69b5b4 100644
--- a/components/lua/scriptscontainer.hpp
+++ b/components/lua/scriptscontainer.hpp
@@ -190,6 +190,8 @@ namespace LuaUtil
             std::optional<sol::table> mInterface;
             std::string mInterfaceName;
             sol::table mHiddenData;
+            std::map<std::string, sol::function> mRegisteredCallbacks;
+            std::map<int64_t, sol::function> mTemporaryCallbacks;
         };
         struct Timer
         {
@@ -207,10 +209,8 @@ namespace LuaUtil
         // Add to container without calling onInit/onLoad.
         bool addScript(int scriptId, std::optional<sol::function>& onInit, std::optional<sol::function>& onLoad);
 
-        // Returns the hidden data of a script.
-        // Each script has a corresponding "hidden data" - a lua table that is not accessible from the script itself,
-        // but can be used by built-in packages. It contains ScriptId and can contain any arbitrary data.
-        sol::table getHiddenData(int scriptId);
+        // Returns script by id (throws an exception if doesn't exist)
+        Script& getScript(int scriptId);
 
         void printError(int scriptId, std::string_view msg, const std::exception& e);
         const std::string& scriptPath(int scriptId) const { return mLua.getConfiguration()[scriptId].mScriptPath; }