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 @@
-0000000000000000017ddc9229aee1465c2d886937f4221f17670a87d25a05f0
-00000000000000000000000000000000000000000107880a19e1783a966f7054
+00000000000000000307337585f9000103c1af9f6a2655fb26ccad992480dfd1
+0000000000000000000000000000000000000000010a3e29d11e8ea2ac87538f
diff --git a/contrib/devtools/chainparams/chainparams_test.txt b/contrib/devtools/chainparams/chainparams_test.txt
--- a/contrib/devtools/chainparams/chainparams_test.txt
+++ b/contrib/devtools/chainparams/chainparams_test.txt
@@ -1,2 +1,2 @@
-00000000fbabb53ec6eddb3d56d3262f30dbb6549b391255090d351eccd01c24
-0000000000000000000000000000000000000000000000512031dc9900995ec4
+0000000000fdd666224731fc707eee787ad3f3281fd381801ef26d4fcea133f1
+000000000000000000000000000000000000000000000052a25c79a348846d12
diff --git a/src/chainparamsconstants.h b/src/chainparamsconstants.h
--- a/src/chainparamsconstants.h
+++ b/src/chainparamsconstants.h
@@ -8,11 +8,11 @@
 #include <uint256.h>
 
 namespace ChainParamsConstants {
-    const uint256 MAINNET_DEFAULT_ASSUME_VALID = uint256S("0000000000000000017ddc9229aee1465c2d886937f4221f17670a87d25a05f0");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000107880a19e1783a966f7054");
+    const uint256 MAINNET_DEFAULT_ASSUME_VALID = uint256S("00000000000000000307337585f9000103c1af9f6a2655fb26ccad992480dfd1");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000010a3e29d11e8ea2ac87538f");
 
-    const uint256 TESTNET_DEFAULT_ASSUME_VALID = uint256S("00000000fbabb53ec6eddb3d56d3262f30dbb6549b391255090d351eccd01c24");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000000000512031dc9900995ec4");
+    const uint256 TESTNET_DEFAULT_ASSUME_VALID = uint256S("0000000000fdd666224731fc707eee787ad3f3281fd381801ef26d4fcea133f1");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("000000000000000000000000000000000000000000000052a25c79a348846d12");
 } // namespace ChainParamsConstants
 
 #endif // BITCOIN_CHAINPARAMSCONSTANTS_H