diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index ad70f6410..165519d4f 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-00000000000000000428cfb3c3ac42459f637bf69504007d2125f3730bf9b0aa
-00000000000000000000000000000000000000000159e478111aaf60717dd2b5
+0000000000000000122383dc1d2573e9daf813ba804cb5296841987a622682dd
+0000000000000000000000000000000000000000015a10853d5778d83c6a90de
 210
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index b502b741e..90da969c6 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-000000000006b8bfb998b6a94b5c70f83334092ee6a7cd5540d0239610309d7f
-00000000000000000000000000000000000000000000006e87ce6540a1be6517
+000000000009bda86dcf8716b6b819974baeb11b56f39a7356e7b7a9a166083d
+00000000000000000000000000000000000000000000006e880035999bc35cf1
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 14e178ee4..33959f033 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("00000000000000000428cfb3c3ac42459f637bf69504007d2125f3730bf9b0aa");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000159e478111aaf60717dd2b5");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000000000122383dc1d2573e9daf813ba804cb5296841987a622682dd");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015a10853d5778d83c6a90de");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 210;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000006b8bfb998b6a94b5c70f83334092ee6a7cd5540d0239610309d7f");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e87ce6540a1be6517");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000009bda86dcf8716b6b819974baeb11b56f39a7356e7b7a9a166083d");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e880035999bc35cf1");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants