diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index 83fe7192d..94da4e10b 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-000000000000000011abdb3d41a79790d18d1ca8e2d80b0a51b95a9cfc52b133
-000000000000000000000000000000000000000001592f908c627bf282e40b2d
+000000000000000012fdaafbce032c8ed9fe224344f2f929d101c835352ead85
+0000000000000000000000000000000000000000015985e6a4f6fdd5784d79b0
 210
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index 4bab74f9d..3535e14c4 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-0000000008ad9bd39b2667bc0af89b60bf83838982e2ae07dbf1f870893781c3
-00000000000000000000000000000000000000000000006e870e01f7a4fe203c
+000000000003a40f7cfa2dd117e5a034a10167e39da2703fe4f110b96899d075
+00000000000000000000000000000000000000000000006e8768e7666c3af543
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 1b89cbdc5..de9ed194a 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("000000000000000011abdb3d41a79790d18d1ca8e2d80b0a51b95a9cfc52b133");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("000000000000000000000000000000000000000001592f908c627bf282e40b2d");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000000000012fdaafbce032c8ed9fe224344f2f929d101c835352ead85");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015985e6a4f6fdd5784d79b0");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 210;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000008ad9bd39b2667bc0af89b60bf83838982e2ae07dbf1f870893781c3");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e870e01f7a4fe203c");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000003a40f7cfa2dd117e5a034a10167e39da2703fe4f110b96899d075");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e8768e7666c3af543");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants