diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index 478f83082..f892c281d 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-000000000000000001d56573c96e9e0d5a2047eb366fbc9d4c38beed1df324fa
-0000000000000000000000000000000000000000015d3876c189ec459269a308
+000000000000000008db21640bcb5ffbf480efb6f72192fc7d57c423e14dfac3
+0000000000000000000000000000000000000000015d6167db9b4c8d5a707bb2
 210
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index 652c6df6c..56c7110d0 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-00000000000b961bf96ad688b70262a4c92acfbfdf766332a8364fcef740093d
-00000000000000000000000000000000000000000000006e916896d0631305d7
+0000000000029740a09e7041d2e04ea7da8b678218c684f7eabfdbfcce5b3f1e
+00000000000000000000000000000000000000000000006e919cbbffa76a5350
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 0ff37b4de..fde118184 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("000000000000000001d56573c96e9e0d5a2047eb366fbc9d4c38beed1df324fa");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015d3876c189ec459269a308");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000000000008db21640bcb5ffbf480efb6f72192fc7d57c423e14dfac3");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015d6167db9b4c8d5a707bb2");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 210;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000b961bf96ad688b70262a4c92acfbfdf766332a8364fcef740093d");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e916896d0631305d7");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000029740a09e7041d2e04ea7da8b678218c684f7eabfdbfcce5b3f1e");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e919cbbffa76a5350");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants