diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index 6ec5ddc8f..6ffe94cb3 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-000000000000000009438ea0d58ec90d45876de279a6bec3c8ff0fd98209b0ce
-0000000000000000000000000000000000000000015e70d9c99c37032ff63ed5
+0000000000000000121921fc130c53617881c1a11d754e753f45932e54b2cc7b
+0000000000000000000000000000000000000000015e97e48cc07cce7ea85fe5
 210
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index 1bc707a9c..fcd53059c 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-00000000000383c7277d86a72652d89686e6322f7db1ac816631f06cad577b73
-00000000000000000000000000000000000000000000006e92c684045681ee05
+0000000000051f558a20e5c26984a4cd4bf0b907dd10ea326d8ba149ba285055
+00000000000000000000000000000000000000000000006e92f23ed92513a161
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 4679cbe89..a82c726aa 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("000000000000000009438ea0d58ec90d45876de279a6bec3c8ff0fd98209b0ce");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015e70d9c99c37032ff63ed5");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000000000121921fc130c53617881c1a11d754e753f45932e54b2cc7b");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015e97e48cc07cce7ea85fe5");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 210;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000383c7277d86a72652d89686e6322f7db1ac816631f06cad577b73");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e92c684045681ee05");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000051f558a20e5c26984a4cd4bf0b907dd10ea326d8ba149ba285055");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e92f23ed92513a161");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants