Pt@ZIF-8 composites with crystallite sizes of ca. 150 nm were synthesized. The composite was used as a catalyst for the regioselective hydrogenation of trans-1,3-hexadiene to 3-hexene. 1-Hexyne was hydrogenated to 1-hexene and hexane while 3-hexyne did not react. In all cases, the Pt@ZIF-8 composite had higher selectivity than Pt/C.