diff -up cmake-3.18.0-rc2/Modules/FindLua.cmake.lua54 cmake-3.18.0-rc2/Modules/FindLua.cmake
--- cmake-3.18.0-rc2/Modules/FindLua.cmake.lua54	2020-06-30 14:17:05.897460893 -0400
+++ cmake-3.18.0-rc2/Modules/FindLua.cmake	2020-06-30 14:17:16.173293679 -0400
@@ -48,7 +48,7 @@ unset(_lua_append_versions)
 
 # this is a function only to have all the variables inside go away automatically
 function(_lua_get_versions)
-    set(LUA_VERSIONS5 5.3 5.2 5.1 5.0)
+    set(LUA_VERSIONS5 5.4 5.3 5.2 5.1 5.0)
 
     if (Lua_FIND_VERSION_EXACT)
         if (Lua_FIND_VERSION_COUNT GREATER 1)
diff -up cmake-3.18.0-rc2/Tests/RunCMake/FindLua/FindLuaTest.cmake.lua54 cmake-3.18.0-rc2/Tests/RunCMake/FindLua/FindLuaTest.cmake
--- cmake-3.18.0-rc2/Tests/RunCMake/FindLua/FindLuaTest.cmake.lua54	2020-06-30 14:17:44.756828608 -0400
+++ cmake-3.18.0-rc2/Tests/RunCMake/FindLua/FindLuaTest.cmake	2020-06-30 14:18:20.411248461 -0400
@@ -59,15 +59,15 @@ function(test_path prefix_path lua_path
 endfunction()
 
 # Simple test
-test_path(prefix1 prefix1/include 5.3)
+test_path(prefix1 prefix1/include 5.4)
 # Find highest version
-test_path(prefix2 prefix2/include/lua5.3 5.3)
-foreach(ver 5.3 5.2 5.1)
+test_path(prefix2 prefix2/include/lua5.4 5.4)
+foreach(ver 5.4 5.3 5.2 5.1)
     # At least X or X.0 -> Highest
     set(VERSION "${ver}")
-    test_path(prefix2 prefix2/include/lua5.3 5.3)
+    test_path(prefix2 prefix2/include/lua5.4 5.4)
     set(VERSION "${ver}.0")
-    test_path(prefix2 prefix2/include/lua5.3 5.3)
+    test_path(prefix2 prefix2/include/lua5.4 5.4)
     # Exactly X/X.0
     set(VERSION "${ver}" EXACT)
     test_path(prefix2 prefix2/include/lua${ver} ${ver})
diff -up cmake-3.18.0-rc2/Tests/RunCMake/FindLua/prefix2/include/lua5.4/lua.h.lua54 cmake-3.18.0-rc2/Tests/RunCMake/FindLua/prefix2/include/lua5.4/lua.h
--- cmake-3.18.0-rc2/Tests/RunCMake/FindLua/prefix2/include/lua5.4/lua.h.lua54	2020-06-30 14:19:19.646284675 -0400
+++ cmake-3.18.0-rc2/Tests/RunCMake/FindLua/prefix2/include/lua5.4/lua.h	2020-06-30 14:19:11.988409288 -0400
@@ -0,0 +1,8 @@
+
+#define LUA_VERSION_MAJOR "5"
+#define LUA_VERSION_MINOR "4"
+#define LUA_VERSION_NUM 504
+#define LUA_VERSION_RELEASE "0"
+
+#define LUA_VERSION "Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
+#define LUA_RELEASE LUA_VERSION "." LUA_VERSION_RELEASE
diff -up cmake-3.18.0-rc2/Tests/RunCMake/FindLua/prefix1/include/lua.h.lua54 cmake-3.18.0-rc2/Tests/RunCMake/FindLua/prefix1/include/lua.h
--- cmake-3.18.0-rc2/Tests/RunCMake/FindLua/prefix1/include/lua.h.lua54	2020-06-30 15:05:35.332154492 -0400
+++ cmake-3.18.0-rc2/Tests/RunCMake/FindLua/prefix1/include/lua.h	2020-06-30 15:05:51.201899127 -0400
@@ -1,8 +1,8 @@
 
 #define LUA_VERSION_MAJOR "5"
-#define LUA_VERSION_MINOR "3"
-#define LUA_VERSION_NUM 503
-#define LUA_VERSION_RELEASE "4"
+#define LUA_VERSION_MINOR "4"
+#define LUA_VERSION_NUM 504
+#define LUA_VERSION_RELEASE "0"
 
 #define LUA_VERSION "Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
 #define LUA_RELEASE LUA_VERSION "." LUA_VERSION_RELEASE