diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index d188a1fc1..61936c564 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-000000000000000003ac9093485db988fb8cfc07c6d6ad1f6268306206aa0ad3
-00000000000000000000000000000000000000000169424d72c0401d88798998
+00000000000000000f8fb8b57ff6f271a9384527acd731cf0dbee4fb1b08b030
+000000000000000000000000000000000000000001696e4d12f26870bf05db61
 211
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index 222e86fff..dcbf3f53e 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-000000000002607a5f86dc7df05e9a1bc6d14b1ff3014805058019d902891236
-00000000000000000000000000000000000000000000006e9e6fad73f91fd528
+000000000000595ae57dda4d2ffc18628f133293a7387eb205b49db13c5a84d1
+00000000000000000000000000000000000000000000006e9e9c2e703220b1a6
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 4e12cf426..1e7ad2c62 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("000000000000000003ac9093485db988fb8cfc07c6d6ad1f6268306206aa0ad3");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000169424d72c0401d88798998");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000000f8fb8b57ff6f271a9384527acd731cf0dbee4fb1b08b030");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("000000000000000000000000000000000000000001696e4d12f26870bf05db61");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 211;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000002607a5f86dc7df05e9a1bc6d14b1ff3014805058019d902891236");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e9e6fad73f91fd528");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000000595ae57dda4d2ffc18628f133293a7387eb205b49db13c5a84d1");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e9e9c2e703220b1a6");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants