diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index e6973f558..325e0e17c 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-00000000000000000c54f3ac9a2998924a9ff322a23e0d7986fc120da15aa9b4
-0000000000000000000000000000000000000000015539d6dad332085cb94e9f
+000000000000000009a663c3634fdd6976d489c8ba42f4d5e8cd38c7b7145dba
+0000000000000000000000000000000000000000015593bb61953e679a5a027d
 210
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index 9befeb475..c6b850ba2 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-000000000004c4c2a367d9b4e67b1a7dc8a1dd198e253423a6208b02bf85270e
-00000000000000000000000000000000000000000000006e83cf02d1fed3528c
+000000000b27de57cd1014986460a1c3b18e1b1158713714c0abf8dd5d495389
+00000000000000000000000000000000000000000000006e84008c748d2a3e0e
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 1b3215f9c..51e5a841e 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("00000000000000000c54f3ac9a2998924a9ff322a23e0d7986fc120da15aa9b4");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015539d6dad332085cb94e9f");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000000000009a663c3634fdd6976d489c8ba42f4d5e8cd38c7b7145dba");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015593bb61953e679a5a027d");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 210;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000004c4c2a367d9b4e67b1a7dc8a1dd198e253423a6208b02bf85270e");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e83cf02d1fed3528c");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000b27de57cd1014986460a1c3b18e1b1158713714c0abf8dd5d495389");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e84008c748d2a3e0e");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants