diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index 55fadc1d2..69b34988b 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-000000000000000025dfc1bacf68e79685cd93d6b5b8ce1b938a57fe97957340
-0000000000000000000000000000000000000000016b8ac18458782f7e1b84a9
+00000000000000001d722d62cec82f8d10226c3889080ac9b5d354a8625be1bf
+0000000000000000000000000000000000000000016ba4b2004e4a1efcadeccd
 211
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index 2e35326ff..aa54dde56 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-00000000000f45a7e2348948cc0481ec918b8d08eb68ecaf01ff58e2a84a7c85
-00000000000000000000000000000000000000000000006ead3d4965a506a0cf
+000000000008afd8c37f77f1bf7316125d98a0ca261827e8db62385228ce36cc
+00000000000000000000000000000000000000000000006ead3eb16d8dfb35fe
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 421522dfc..4c53bde24 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("000000000000000025dfc1bacf68e79685cd93d6b5b8ce1b938a57fe97957340");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000016b8ac18458782f7e1b84a9");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000001d722d62cec82f8d10226c3889080ac9b5d354a8625be1bf");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000016ba4b2004e4a1efcadeccd");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 211;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000f45a7e2348948cc0481ec918b8d08eb68ecaf01ff58e2a84a7c85");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006ead3d4965a506a0cf");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000008afd8c37f77f1bf7316125d98a0ca261827e8db62385228ce36cc");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006ead3eb16d8dfb35fe");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants