The UK theatrical release had compulsory cuts made. 5 seconds of cuts were required to remove sight of real animal cruelty, in this instance three cruel horse falls, in line with the requirements of the Cinematograph Films (Animals) Act 1937.
After the release in Cannes the film got two final versions, a Korean and an international one. The international version is shorter and has better pacing and the music changes slightly in some scenes. The main difference in the Korean version is the ending, which adds a few more scenes after the Mexican standoff giving (some rather vague) explanation for the film's epilogue.