diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index c63eb5b34..a360457d4 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -61,8 +61,8 @@ class CMainParams : public CChainParams {
 
         // Deployment of BIP68, BIP112, and BIP113.
         consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
-        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1462060800; // May 1st, 2016
-        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1493596800; // May 1st, 2017
+        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1521504000; // 2018-03-20
+        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1553040000; // 2019-03-20
 
         pchMessageStart[0] = 0xa8;
         pchMessageStart[1] = 0xea;