diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index ae04bcc14..550509bf1 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-000000000000000018ca205779800f410d9daeb9be6bb4695b61d9ba8b99ffcb
-0000000000000000000000000000000000000000016bcbb906e0b66e451ec5ff
+00000000000000000a4534a147c2d06772905e0150defe2a803ade84a3d64dc8
+0000000000000000000000000000000000000000016bd9bf7229e1a16a31f9e7
 211
 3
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 80d625f32..149e91c84 100644
--- a/src/networks/abc/chainparamsconstants.cpp
+++ b/src/networks/abc/chainparamsconstants.cpp
@@ -1,18 +1,18 @@
 /**
  * @generated by contrib/devtools/chainparams/generate_chainparams_constants.py
  */
 
 #include <chainparamsconstants.h>
 
 namespace ChainParamsConstants {
-    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000000000018ca205779800f410d9daeb9be6bb4695b61d9ba8b99ffcb");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000016bcbb906e0b66e451ec5ff");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000000a4534a147c2d06772905e0150defe2a803ade84a3d64dc8");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000016bd9bf7229e1a16a31f9e7");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 211;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
     const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000008afd8c37f77f1bf7316125d98a0ca261827e8db62385228ce36cc");
     const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006ead3eb16d8dfb35fe");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants