What is the best knot to tie halyard to boom?

I went on my first ever sail on a Sunfish last weekend and had a blast until the halyard clove hitch slipped on the boom and the sail came crashing down in about 10 knots of wind. Instead of trying to attach the halyard to the boom, and raise the sail, I had to shamelessly paddle back to the dock. The next time I go out, would it be best to use a Constrictor Knot instead of a Clove Hitch to attach the halyard to the boom?