diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index 87929f5eb..26e078b34 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-00000000000000001c1314cabb649ed94c0f933505d4d81c84bd868365383c67
-000000000000000000000000000000000000000001545379ac8f75e084ae1666
+000000000000000027a3d23198d484d3d3611a7e0a539b41a2aa1e9315661bea
+0000000000000000000000000000000000000000015460646ce6eae573aa5d9f
 210
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index 3db79a5fc..f41aaef92 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-000000000007ecb7e0ff8946ae70bf0fd5915f3399dcc3dbc27a520d051f7d61
-00000000000000000000000000000000000000000000006e812b7407efb9f337
+000000000012fb53e6d00f3115e7aac5438fd9411f946da96105253e875a22f4
+00000000000000000000000000000000000000000000006e815cd052f7b7cca3
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 17db52844..7cc400f65 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("00000000000000001c1314cabb649ed94c0f933505d4d81c84bd868365383c67");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("000000000000000000000000000000000000000001545379ac8f75e084ae1666");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000000000027a3d23198d484d3d3611a7e0a539b41a2aa1e9315661bea");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015460646ce6eae573aa5d9f");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 210;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000007ecb7e0ff8946ae70bf0fd5915f3399dcc3dbc27a520d051f7d61");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e812b7407efb9f337");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000012fb53e6d00f3115e7aac5438fd9411f946da96105253e875a22f4");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e815cd052f7b7cca3");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants