diff --git a/ChangeLog.md b/ChangeLog.md
index cb31869484a70..dc93f4340b747 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -409,6 +409,7 @@ See docs/process.md for more on how version tagging works.
   detection stages.  This means the initial cmake run will be slower, but will
   result in more accurate information.  If cmake is running too slow for you,
   you can revert to the previous behaviour with `-DEMSCRIPTEN_FORCE_COMPILERS=ON`.
+- Upgraded `contrib.lua` to Lua version 5.5.0 (#26033)
 
 4.0.1 - 01/17/25
 ----------------
diff --git a/tools/ports/contrib/lua.py b/tools/ports/contrib/lua.py
index fa7a7e83205f2..a815a7dffdb3c 100644
--- a/tools/ports/contrib/lua.py
+++ b/tools/ports/contrib/lua.py
@@ -5,8 +5,8 @@
 
 import os
 
-TAG = '5.4.7'
-HASH = '98c5c8978dfdf867e37e9eb3b3ec83dee92d199243b5119505da83895e33f10d43c841be6a7d3b106daba8a0b2bd25fe099ebff8f87831dcc55c79c78b97d8b8'
+TAG = '5.5.0'
+HASH = '3253d2cdc929da6438095a30d66ef16a1abdbb0ada8fee238705b3b38492f14be9553640fdca6b25661e01155ba5582032e0a2ef064e4c283e85efc0a128cabe'
 
 # contrib port information (required)
 URL = 'https://www.lua.org/'
@@ -36,9 +36,7 @@ def create(final):
        ldblib.c liolib.c lmathlib.c loadlib.c loslib.c lstrlib.c ltablib.c lutf8lib.c linit.c
        '''.split()
 
-    flags = ['-DLUA_COMPAT_5_3']
-
-    ports.build_port(source_path, final, port_name, srcs=srcs, flags=flags)
+    ports.build_port(source_path, final, port_name, srcs=srcs)
 
   return [shared.cache.get_lib(lib_name, create, what='port')]