The Russian government promoted the spread of the Russian language among the native Ukrainian population by actively suppressing the Ukrainian language. Alarmed by the threat of Ukrainian separatism implied by a growing number of school textbooks teaching the Ukrainian language, the Russian Minister of Internal Affairs Pyotr Valuev in 1863 issued a secret decree that banned the publication of religious texts and educational texts written in the Ukrainian language. This ban was expanded by Tsar Alexander II who issued the Ems Ukaz in 1876. All Ukrainian language books and song lyrics were banned, as was the importation of such works. Furthermore, Ukrainian-language public performances, plays, and lectures were forbidden. In 1881, the decree was amended to allow the publishing of lyrics and dictionaries, and the performances of some plays in the Ukrainian language with local officials' approval. Ukrainian-only troupes were forbidden.