diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
index b8f90fbb4..9ae5de4a2 100644
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -196,6 +196,7 @@ if(ENABLE_SCRIPTING)
     script/properties_class.cpp
     script/range_class.cpp
     script/rectangle_class.cpp
+    script/require.cpp
     script/security.cpp
     script/selection_class.cpp
     script/site_class.cpp
diff --git a/src/app/cli/default_cli_delegate.cpp b/src/app/cli/default_cli_delegate.cpp
index fa65211d4..4f0e78241 100644
--- a/src/app/cli/default_cli_delegate.cpp
+++ b/src/app/cli/default_cli_delegate.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2022  Igara Studio S.A.
+// Copyright (C) 2018-2023  Igara Studio S.A.
 // Copyright (C) 2016-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -137,7 +137,7 @@ int DefaultCliDelegate::execScript(const std::string& filename,
                                    const Params& params)
 {
   auto engine = App::instance()->scriptEngine();
-  if (!engine->evalFile(filename, params))
+  if (!engine->evalUserFile(filename, params))
     throw base::Exception("Error executing script %s", filename.c_str());
   return engine->returnCode();
 }
diff --git a/src/app/commands/cmd_run_script.cpp b/src/app/commands/cmd_run_script.cpp
index b04dc48f7..68f187033 100644
--- a/src/app/commands/cmd_run_script.cpp
+++ b/src/app/commands/cmd_run_script.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2022  Igara Studio S.A.
+// Copyright (C) 2018-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -78,7 +78,7 @@ void RunScriptCommand::onExecute(Context* context)
 
   App::instance()
     ->scriptEngine()
-    ->evalFile(m_filename, m_params);
+    ->evalUserFile(m_filename, m_params);
 
 #if ENABLE_UI
   if (context->isUIAvailable())
diff --git a/src/app/extensions.cpp b/src/app/extensions.cpp
index 4f4f2a349..da9806038 100644
--- a/src/app/extensions.cpp
+++ b/src/app/extensions.cpp
@@ -35,6 +35,7 @@
 #ifdef ENABLE_SCRIPTING
   #include "app/script/engine.h"
   #include "app/script/luacpp.h"
+  #include "app/script/require.h"
 #endif
 
 #include "archive.h"
@@ -627,6 +628,10 @@ void Extension::initScripts()
   script::push_plugin(L, this);
   m_plugin.pluginRef = luaL_ref(L, LUA_REGISTRYINDEX);
 
+  // Set the _PLUGIN global so require() can find .lua files from the
+  // plugin path.
+  script::SetPluginForRequire setPlugin(L, m_plugin.pluginRef);
+
   // Read plugin.preferences value
   {
     std::string fn = base::join_path(m_path, kPrefLua);
@@ -665,7 +670,7 @@ void Extension::initScripts()
       lua_pop(L, 1);
     }
 
-    // Call the init() function of thi sscript with a Plugin object as first parameter
+    // Call the init() function of this script with a Plugin object as first parameter
     if (lua_getglobal(L, "init") == LUA_TFUNCTION) {
       // Call init(plugin)
       lua_rawgeti(L, LUA_REGISTRYINDEX, m_plugin.pluginRef);
diff --git a/src/app/script/engine.cpp b/src/app/script/engine.cpp
index 9386901e2..c2812e183 100644
--- a/src/app/script/engine.cpp
+++ b/src/app/script/engine.cpp
@@ -18,6 +18,7 @@
 #include "app/pref/preferences.h"
 #include "app/script/blend_mode.h"
 #include "app/script/luacpp.h"
+#include "app/script/require.h"
 #include "app/script/security.h"
 #include "app/sprite_sheet_type.h"
 #include "app/tilemap_mode.h"
@@ -217,16 +218,7 @@ Engine::Engine()
 #endif
 
   // Standard Lua libraries
-  luaL_requiref(L, LUA_GNAME, luaopen_base, 1);
-  luaL_requiref(L, LUA_COLIBNAME, luaopen_coroutine, 1);
-  luaL_requiref(L, LUA_TABLIBNAME, luaopen_table, 1);
-  luaL_requiref(L, LUA_IOLIBNAME, luaopen_io, 1);
-  luaL_requiref(L, LUA_OSLIBNAME, luaopen_os, 1);
-  luaL_requiref(L, LUA_STRLIBNAME, luaopen_string, 1);
-  luaL_requiref(L, LUA_MATHLIBNAME, luaopen_math, 1);
-  luaL_requiref(L, LUA_UTF8LIBNAME, luaopen_utf8, 1);
-  luaL_requiref(L, LUA_DBLIBNAME, luaopen_debug, 1);
-  lua_pop(L, 9);
+  luaL_openlibs(L);
 
   // Overwrite Lua functions
   lua_register(L, "print", print);
@@ -255,6 +247,9 @@ Engine::Engine()
   lua_setfield(L, -2, "execute");
   lua_pop(L, 1);
 
+  // Enhance require() function for plugins
+  custom_require_function(L);
+
   // Generic code used by metatables
   run_mt_index_code(L);
 
@@ -579,7 +574,7 @@ bool Engine::evalFile(const std::string& filename,
   }
   std::string absFilename = base::get_absolute_path(filename);
 
-  AddScriptFilename add(absFilename);
+  AddScriptFilename addScript(absFilename);
   set_app_params(L, params);
 
   if (g_debuggerDelegate)
@@ -593,6 +588,18 @@ bool Engine::evalFile(const std::string& filename,
   return result;
 }
 
+bool Engine::evalUserFile(const std::string& filename,
+                          const Params& params)
+{
+  // Set the _SCRIPT_PATH global so require() can find .lua files from
+  // the script path.
+  std::string path =
+    base::get_file_path(
+      base::get_absolute_path(filename));
+  SetScriptForRequire setScript(L, path.c_str());
+  return evalFile(filename, params);
+}
+
 void Engine::startDebugger(DebuggerDelegate* debuggerDelegate)
 {
   g_debuggerDelegate = debuggerDelegate;
diff --git a/src/app/script/engine.h b/src/app/script/engine.h
index ec7e69368..6159a5bf5 100644
--- a/src/app/script/engine.h
+++ b/src/app/script/engine.h
@@ -96,6 +96,8 @@ namespace app {
                   const std::string& filename = std::string());
     bool evalFile(const std::string& filename,
                   const Params& params = Params());
+    bool evalUserFile(const std::string& filename,
+                      const Params& params = Params());
 
     void consolePrint(const char* text) {
       onConsolePrint(text);
diff --git a/src/app/script/luacpp.cpp b/src/app/script/luacpp.cpp
index af190e794..a104e2beb 100644
--- a/src/app/script/luacpp.cpp
+++ b/src/app/script/luacpp.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018  Igara Studio S.A.
+// Copyright (C) 2018-2023  Igara Studio S.A.
 // Copyright (C) 2018  David Capello
 //
 // This program is distributed under the terms of
@@ -44,6 +44,8 @@ void run_mt_index_code(lua_State* L)
     const char* s = lua_tostring(L, -1);
     if (s)
       std::puts(s);
+
+    lua_pop(L, 1);
   }
 }
 
diff --git a/src/app/script/plugin_class.cpp b/src/app/script/plugin_class.cpp
index 466391254..45f711cb1 100644
--- a/src/app/script/plugin_class.cpp
+++ b/src/app/script/plugin_class.cpp
@@ -313,6 +313,20 @@ int Plugin_newMenuSeparator(lua_State* L)
   return 0;
 }
 
+int Plugin_get_name(lua_State* L)
+{
+  auto plugin = get_obj<Plugin>(L, 1);
+  lua_pushstring(L, plugin->ext->name().c_str());
+  return 1;
+}
+
+int Plugin_get_path(lua_State* L)
+{
+  auto plugin = get_obj<Plugin>(L, 1);
+  lua_pushstring(L, plugin->ext->path().c_str());
+  return 1;
+}
+
 int Plugin_get_preferences(lua_State* L)
 {
   if (!lua_getuservalue(L, 1)) {
@@ -341,6 +355,8 @@ const luaL_Reg Plugin_methods[] = {
 };
 
 const Property Plugin_properties[] = {
+  { "name", Plugin_get_name, nullptr },
+  { "path", Plugin_get_path, nullptr },
   { "preferences", Plugin_get_preferences, Plugin_set_preferences },
   { nullptr, nullptr, nullptr }
 };
diff --git a/src/app/script/require.cpp b/src/app/script/require.cpp
new file mode 100644
index 000000000..6b4041709
--- /dev/null
+++ b/src/app/script/require.cpp
@@ -0,0 +1,105 @@
+// Aseprite
+// Copyright (c) 2023  Igara Studio S.A.
+//
+// This program is distributed under the terms of
+// the End-User License Agreement for Aseprite.
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "app/script/require.h"
+
+#include "app/extensions.h"
+
+#include <cstring>
+
+namespace app {
+namespace script {
+
+static void eval_code(lua_State* L, const char* code)
+{
+  if (luaL_loadbuffer(L, code, std::strlen(code), "internal") ||
+      lua_pcall(L, 0, 0, 0)) {
+    // Error case
+    const char* s = lua_tostring(L, -1);
+    if (s)
+      std::puts(s);
+
+    lua_pop(L, 1);
+  }
+}
+
+void custom_require_function(lua_State* L)
+{
+  eval_code(L, R"(
+_PACKAGE_PATH_STACK = {}
+
+local origRequire = require
+function require(name)
+  if _PLUGIN then
+    local module = origRequire(_PLUGIN.name .. '/' .. name)
+    if module then return module end
+  end
+  return origRequire(name)
+end
+
+local origLuaSearcher = package.searchers[2]
+package.searchers[2] = function(name)
+  if _PLUGIN then
+    name = name:sub(#_PLUGIN.name+2)
+  end
+  return origLuaSearcher(name)
+end
+)");
+}
+
+SetPluginForRequire::SetPluginForRequire(lua_State* L, int pluginRef) : L(L)
+{
+  lua_rawgeti(L, LUA_REGISTRYINDEX, pluginRef);
+  lua_setglobal(L, "_PLUGIN");
+
+  // We could use all elements of package.config, but "/?.lua;" should work:
+  //
+  //   local templateSep = package.config:sub(3, 3)
+  //   local substitutionPoint = package.config:sub(5, 5)
+  //
+  eval_code(L, R"(
+table.insert(_PACKAGE_PATH_STACK, package.path)
+
+local pathSep = package.config:sub(1, 1)
+package.path = _PLUGIN.path .. pathSep .. '?.lua;' .. package.path
+)");
+}
+
+SetPluginForRequire::~SetPluginForRequire()
+{
+  eval_code(L, R"(
+package.path = table.remove(_PACKAGE_PATH_STACK)
+_PLUGIN_OLDPATH = nil
+_PLUGIN = nil
+)");
+}
+
+SetScriptForRequire::SetScriptForRequire(lua_State* L, const char* path) : L(L)
+{
+  lua_pushstring(L, path);
+  lua_setglobal(L, "_SCRIPT_PATH");
+  eval_code(L, R"(
+table.insert(_PACKAGE_PATH_STACK, package.path)
+
+local pathSep = package.config:sub(1, 1)
+package.path = _SCRIPT_PATH .. pathSep .. '?.lua;' .. package.path
+)");
+}
+
+SetScriptForRequire::~SetScriptForRequire()
+{
+  eval_code(L, R"(
+package.path = table.remove(_PACKAGE_PATH_STACK)
+_SCRIPT_PATH = nil
+)");
+}
+
+} // namespace script
+} // namespace app
diff --git a/src/app/script/require.h b/src/app/script/require.h
new file mode 100644
index 000000000..b33a505c4
--- /dev/null
+++ b/src/app/script/require.h
@@ -0,0 +1,39 @@
+// Aseprite
+// Copyright (c) 2023  Igara Studio S.A.
+//
+// This program is distributed under the terms of
+// the End-User License Agreement for Aseprite.
+
+#ifndef APP_SCRIPT_REQUIRE_H_INCLUDED
+#define APP_SCRIPT_REQUIRE_H_INCLUDED
+#pragma once
+
+#include "app/script/luacpp.h"
+
+#include <string>
+
+namespace app {
+namespace script {
+
+class SetPluginForRequire {
+public:
+  SetPluginForRequire(lua_State* L, int pluginRef);
+  ~SetPluginForRequire();
+private:
+  lua_State* L;
+};
+
+class SetScriptForRequire {
+public:
+  SetScriptForRequire(lua_State* L, const char* path);
+  ~SetScriptForRequire();
+private:
+  lua_State* L;
+};
+
+void custom_require_function(lua_State* L);
+
+} // namespace script
+} // namespace app
+
+#endif
diff --git a/tests/scripts/require.lua b/tests/scripts/require.lua
new file mode 100644
index 000000000..fbadfe577
--- /dev/null
+++ b/tests/scripts/require.lua
@@ -0,0 +1,11 @@
+-- Copyright (c) 2023  Igara Studio S.A.
+--
+-- This file is released under the terms of the MIT license.
+-- Read LICENSE.txt for more information.
+
+local mod = require 'require_module'
+assert(mod.a == 5)
+mod.a = 6
+
+local mod2 = require 'require_module'
+assert(mod2.a == 6) -- Now mod and mod2 points to the same object
diff --git a/tests/scripts/require_module.lua b/tests/scripts/require_module.lua
new file mode 100644
index 000000000..cec4633b9
--- /dev/null
+++ b/tests/scripts/require_module.lua
@@ -0,0 +1,6 @@
+-- Copyright (c) 2023  Igara Studio S.A.
+--
+-- This file is released under the terms of the MIT license.
+-- Read LICENSE.txt for more information.
+
+return { a=5 }
diff --git a/third_party/lua b/third_party/lua
index db8284f5f..04abf20c9 160000
--- a/third_party/lua
+++ b/third_party/lua
@@ -1 +1 @@
-Subproject commit db8284f5fc6f02f8f800c99b84b5e4f640e893ce
+Subproject commit 04abf20c9e8c973c62b30d0b98f6884ff665b1ba