diff --git a/src/LuaJITEngine.cpp b/src/LuaJITEngine.cpp
index 2ce826b..0ec77ef 100644
--- a/src/LuaJITEngine.cpp
+++ b/src/LuaJITEngine.cpp
@@ -114,8 +114,8 @@ struct LuaJITEngine : ScriptEngine {
 		// Declare the function `_castBlock` used to transform `luaBlock` pointer into a LuaJIT cdata
 		<< "_ffi_cast = ffi.cast" << std::endl
 		<< "function _castBlock(b) return _ffi_cast('struct LuaProcessBlock*', b) end" << std::endl
-		// Unload ffi and require
-		<< "ffi = nil; require = nil;" << std::endl;
+		// Remove global functions that could be abused
+		<< "jit = nil; require = nil; ffi = nil; load = nil; loadfile = nil; loadstring = nil; dofile = nil;" << std::endl;
 		std::string ffi_script = ffi_stream.str();
 
 		// Compile the ffi script