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Component-based programming is a current trend in the development of software. The application is created using components and binding their interfaces appropriately at the configuration level. This is especially interesting for applications that, for availability reasons, claim dynamic reconfiguration. This paper describes an approach for the dynamic reconfiguration of applications based on CORBA components running in an environment called LuaSpace that is composed by the dynamically typed language Lua and a set of tools based on Lua. Components, scripts and glue code are the elements that form an application expressed in Lua. LuaSpace provides support for both programmed and ad-hoc reconfiguration. Although our work focuses on the configuration level, LuaSpace also handles component updating.