diff --git a/contrib/devtools/chainparams/chainparams_main.txt b/contrib/devtools/chainparams/chainparams_main.txt
--- a/contrib/devtools/chainparams/chainparams_main.txt
+++ b/contrib/devtools/chainparams/chainparams_main.txt
@@ -1,2 +1,2 @@
-00000000000000000108949fa3b9135d96cc4a8035d78f71f2d20d48ddba0fcc
-00000000000000000000000000000000000000000104bec5e3f314ffc7e51b26
+0000000000000000017ddc9229aee1465c2d886937f4221f17670a87d25a05f0
+00000000000000000000000000000000000000000107880a19e1783a966f7054
diff --git a/src/chainparamsconstants.h b/src/chainparamsconstants.h
--- a/src/chainparamsconstants.h
+++ b/src/chainparamsconstants.h
@@ -8,8 +8,8 @@
 #include <uint256.h>
 
 namespace ChainParamsConstants {
-    const uint256 MAINNET_DEFAULT_ASSUME_VALID = uint256S("00000000000000000108949fa3b9135d96cc4a8035d78f71f2d20d48ddba0fcc");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000104bec5e3f314ffc7e51b26");
+    const uint256 MAINNET_DEFAULT_ASSUME_VALID = uint256S("0000000000000000017ddc9229aee1465c2d886937f4221f17670a87d25a05f0");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000107880a19e1783a966f7054");
 
     const uint256 TESTNET_DEFAULT_ASSUME_VALID = uint256S("00000000fbabb53ec6eddb3d56d3262f30dbb6549b391255090d351eccd01c24");
     const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000000000512031dc9900995ec4");