diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index fa0a52b3b..d8a04f715 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-0000000000000000077d2b3654b555e761f7668214d33031c5b79e13c067c6b5
-00000000000000000000000000000000000000000169c44563c298c981ed9c07
+0000000000000000038597f6b5581b37ec51346f752e64d93347505673c369b3
+00000000000000000000000000000000000000000169f2fc10551939da900109
 211
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index c8b909050..cd8aba9cc 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-0000000005e8b8a3e04bfb6a09196e0e5392d9b44b650413822fb6d7044f7da5
-00000000000000000000000000000000000000000000006e9efa687dda922009
+000000000005a298698bb952571cbb17d979e91e887df7b841dbe3ce7ff78aa9
+00000000000000000000000000000000000000000000006e9f2a78f648e4c19d
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 944bb2772..cd6e7f8e8 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("0000000000000000077d2b3654b555e761f7668214d33031c5b79e13c067c6b5");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000169c44563c298c981ed9c07");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000000000038597f6b5581b37ec51346f752e64d93347505673c369b3");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000169f2fc10551939da900109");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 211;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000005e8b8a3e04bfb6a09196e0e5392d9b44b650413822fb6d7044f7da5");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e9efa687dda922009");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000005a298698bb952571cbb17d979e91e887df7b841dbe3ce7ff78aa9");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e9f2a78f648e4c19d");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants