diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index 6ffe94cb3..6b785d766 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-0000000000000000121921fc130c53617881c1a11d754e753f45932e54b2cc7b
-0000000000000000000000000000000000000000015e97e48cc07cce7ea85fe5
+000000000000000003bbb77a59b1b5162ce65b14b4a3aed64a6c2b00c2867558
+0000000000000000000000000000000000000000015e9baca4b437deb51278c8
 210
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index fcd53059c..b338ddedf 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-0000000000051f558a20e5c26984a4cd4bf0b907dd10ea326d8ba149ba285055
-00000000000000000000000000000000000000000000006e92f23ed92513a161
+000000000569ec699c9d725d239d468c44523e566607a628bf77c640faeabfd5
+00000000000000000000000000000000000000000000006e92f6e9fd8fd90367
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index a82c726aa..bfe1cbbd9 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("0000000000000000121921fc130c53617881c1a11d754e753f45932e54b2cc7b");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015e97e48cc07cce7ea85fe5");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000000000003bbb77a59b1b5162ce65b14b4a3aed64a6c2b00c2867558");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015e9baca4b437deb51278c8");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 210;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000051f558a20e5c26984a4cd4bf0b907dd10ea326d8ba149ba285055");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e92f23ed92513a161");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000569ec699c9d725d239d468c44523e566607a628bf77c640faeabfd5");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e92f6e9fd8fd90367");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants