 The Bulgarian Communist Party, under the leadership of general secretary Todor Zhivkov, used the outbreak of the Prague Spring as a pretext to tighten control over all social organizations and heavily re-emphasize "democratic centralism" within the party.Zhivkov and his colleagues were determined to reassure the Soviets that there would not be a Bulgarian version of the Prague Spring.A major result of the events of 1968 was the decision to replace the Dimitrov Constitution of 1947.