diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index febdf3b15..ad70f6410 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-000000000000000002811f81fa3038f54fececdee01d352c540964c618ab6ee3
-00000000000000000000000000000000000000000159b995d433b22ad7419b5f
+00000000000000000428cfb3c3ac42459f637bf69504007d2125f3730bf9b0aa
+00000000000000000000000000000000000000000159e478111aaf60717dd2b5
 210
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index c36edde64..b502b741e 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-000000000007246b9ea791e3da0a979862cb83c61ee9562d97b0df64f14160f0
-00000000000000000000000000000000000000000000006e879e82c9fd4c5e02
+000000000006b8bfb998b6a94b5c70f83334092ee6a7cd5540d0239610309d7f
+00000000000000000000000000000000000000000000006e87ce6540a1be6517
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 03f0e9191..14e178ee4 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("000000000000000002811f81fa3038f54fececdee01d352c540964c618ab6ee3");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000159b995d433b22ad7419b5f");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000000428cfb3c3ac42459f637bf69504007d2125f3730bf9b0aa");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000159e478111aaf60717dd2b5");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 210;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000007246b9ea791e3da0a979862cb83c61ee9562d97b0df64f14160f0");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e879e82c9fd4c5e02");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000006b8bfb998b6a94b5c70f83334092ee6a7cd5540d0239610309d7f");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e87ce6540a1be6517");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants