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 @@
-00000000000000000307337585f9000103c1af9f6a2655fb26ccad992480dfd1
-0000000000000000000000000000000000000000010a3e29d11e8ea2ac87538f
+000000000000000001733fc821accb8cfc1baea470c3d8136ef88f49f9fdaa29
+0000000000000000000000000000000000000000010cd588ba477e3191d07a66
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 @@
-0000000000fdd666224731fc707eee787ad3f3281fd381801ef26d4fcea133f1
-000000000000000000000000000000000000000000000052a25c79a348846d12
+00000000000026dceb531694713c3e3b991507a7affa879ea389adf449f2dab0
+000000000000000000000000000000000000000000000052bb5d1f0ac7545fee
diff --git a/src/chainparamsconstants.h b/src/chainparamsconstants.h
--- a/src/chainparamsconstants.h
+++ b/src/chainparamsconstants.h
@@ -9,11 +9,11 @@
 #include <uint256.h>
 
 namespace ChainParamsConstants {
-    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000000307337585f9000103c1af9f6a2655fb26ccad992480dfd1");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000010a3e29d11e8ea2ac87538f");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000000000001733fc821accb8cfc1baea470c3d8136ef88f49f9fdaa29");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000010cd588ba477e3191d07a66");
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000fdd666224731fc707eee787ad3f3281fd381801ef26d4fcea133f1");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("000000000000000000000000000000000000000000000052a25c79a348846d12");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000026dceb531694713c3e3b991507a7affa879ea389adf449f2dab0");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("000000000000000000000000000000000000000000000052bb5d1f0ac7545fee");
 } // namespace ChainParamsConstants
 
 #endif // BITCOIN_CHAINPARAMSCONSTANTS_H