diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index 2e5eaeb4c..205ded034 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-00000000000000002477a74b071f148ebbc50ee0258381523d9775afeb9e8a66
-0000000000000000000000000000000000000000016b3a9634fdaf164aa03782
+0000000000000000026429811b4ac94f242a3500903c57fb3d3ecd111358d2dc
+0000000000000000000000000000000000000000016b54f157f053925e34e4d2
 211
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index f154e7d54..8617aed3f 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-000000000004d9202d387519cf94fb6cebb916f8244ff3a8db42c1a1c9aa43af
-00000000000000000000000000000000000000000000006eacaf65c612dcd5ba
+00000000059283e030fdcc0494d5ff25b28e21ddcc16e7a39156748fa32108a0
+00000000000000000000000000000000000000000000006eace1cd899e3495d0
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index a5699a0e6..19232a66e 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("00000000000000002477a74b071f148ebbc50ee0258381523d9775afeb9e8a66");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000016b3a9634fdaf164aa03782");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000000000026429811b4ac94f242a3500903c57fb3d3ecd111358d2dc");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000016b54f157f053925e34e4d2");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 211;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000004d9202d387519cf94fb6cebb916f8244ff3a8db42c1a1c9aa43af");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006eacaf65c612dcd5ba");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000059283e030fdcc0494d5ff25b28e21ddcc16e7a39156748fa32108a0");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006eace1cd899e3495d0");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants