diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index d8623adb1..e224beb84 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-00000000000000000cdb64664b4442c184f9416adb0e0850948786bf2ee6283b
-00000000000000000000000000000000000000000153a156596a4a60132ad855
+00000000000000008e66be09cd59c4c5141cebfe4953a833fcaf835e68a66a9e
+00000000000000000000000000000000000000000153a90cf7a84102d82880f1
 209
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index 120b2e5c2..11c01fe61 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-000000000109b0a56e8e61ba9da9e1e2b5cced845992db3e2535780ca3de16c2
-00000000000000000000000000000000000000000000006e7df350ec9a5844bf
+000000000008f1ac808d650f860491741be88df5125f0725169219399ce91c29
+00000000000000000000000000000000000000000000006e7e1e1c1ff93356cb
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 0a2a19b76..545fee2af 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("00000000000000000cdb64664b4442c184f9416adb0e0850948786bf2ee6283b");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000153a156596a4a60132ad855");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000008e66be09cd59c4c5141cebfe4953a833fcaf835e68a66a9e");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000153a90cf7a84102d82880f1");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 209;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000109b0a56e8e61ba9da9e1e2b5cced845992db3e2535780ca3de16c2");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e7df350ec9a5844bf");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000008f1ac808d650f860491741be88df5125f0725169219399ce91c29");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e7e1e1c1ff93356cb");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants