diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index f8ef8588a5..348e077684 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -443,7 +443,7 @@ class CMainParams : public CChainParams {
 
         consensus.evoSporkKeyID = "a78fERshquPsTv2TuKMSsxTeKom56uBwLP";
         consensus.nEvoSporkStartBlock = ZC_LELANTUS_STARTING_BLOCK;
-        consensus.nEvoSporkStopBlock = AdjustEndingBlockNumberAfterSubsidyHalving(ZC_LELANTUS_STARTING_BLOCK, 3*24*12*365, 486221);  // =818275, three years after lelantus
+        consensus.nEvoSporkStopBlock = AdjustEndingBlockNumberAfterSubsidyHalving(ZC_LELANTUS_STARTING_BLOCK, 4*24*12*365, 486221);  // =1028515, four years after lelantus, one year after spark
         consensus.nEvoSporkStopBlockExtensionVersion = 140903;
         consensus.nEvoSporkStopBlockPrevious = ZC_LELANTUS_STARTING_BLOCK + 1*24*12*365; // one year after lelantus
         consensus.nEvoSporkStopBlockExtensionGracefulPeriod = 24*12*14; // two weeks