diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index ca35cd3c5..801885e30 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-0000000000000000020875b73577bbdaeb7372889f7e559a0c821af5d64c247c
-0000000000000000000000000000000000000000015c40084ec198ac4e605e27
+00000000000000000ee12d22b76734926d936feee49998d7ba4b6f0f470fe049
+0000000000000000000000000000000000000000015c631a8d6fe1cdd010a038
 210
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index d4b78544b..2f3fb4099 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-000000000000f9a15b85d4706e0f31caae748c770ff7ece0786c21cc93adec9c
-00000000000000000000000000000000000000000000006e903feaf4694eb89a
+0000000000031fc6c7314da2b4b94c9a828554991e86a835c291345a8dbead08
+00000000000000000000000000000000000000000000006e9067cbe1b173d01c
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 5daa90156..408803f23 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("0000000000000000020875b73577bbdaeb7372889f7e559a0c821af5d64c247c");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015c40084ec198ac4e605e27");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000000ee12d22b76734926d936feee49998d7ba4b6f0f470fe049");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000015c631a8d6fe1cdd010a038");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 210;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000000f9a15b85d4706e0f31caae748c770ff7ece0786c21cc93adec9c");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e903feaf4694eb89a");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000031fc6c7314da2b4b94c9a828554991e86a835c291345a8dbead08");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e9067cbe1b173d01c");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants