diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index e92cc52f6..5004ae595 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-0000000000000000135b995b74ffd197927f4b70cde34e121238763176266dfd
-00000000000000000000000000000000000000000166de95c0af2aa510cbaefa
+0000000000000000027d725ae31a732ebd0942cb7c0786fbc5ca387b822fad7c
+00000000000000000000000000000000000000000166e70eee045fa7a8087a60
 211
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index 4773b6ce9..d72232fc7 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-0000000000022c8a179958cd11c726b475f439496cda53d49264cf223c7eaf18
-00000000000000000000000000000000000000000000006e9baf7d0269ab57ca
+00000000023c54efdef93553488606043693f998e97a5446c6aa694fe6ae2250
+00000000000000000000000000000000000000000000006e9bbe253e03ede96c
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 0181cc42c..6fe982870 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("0000000000000000135b995b74ffd197927f4b70cde34e121238763176266dfd");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000166de95c0af2aa510cbaefa");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000000000027d725ae31a732ebd0942cb7c0786fbc5ca387b822fad7c");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000166e70eee045fa7a8087a60");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 211;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000022c8a179958cd11c726b475f439496cda53d49264cf223c7eaf18");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e9baf7d0269ab57ca");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000023c54efdef93553488606043693f998e97a5446c6aa694fe6ae2250");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e9bbe253e03ede96c");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants