diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index d83121421..cd18357b6 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-00000000000000009d4bdeafa84eff79850c61fcc2d211b9aa2fba4ffcce6e30
-00000000000000000000000000000000000000000153e09093c1b0db4f837365
+00000000000000003f873e1d939dc32e4b59f06b735d6a4848e8fc54db97058a
+00000000000000000000000000000000000000000153e9802ba062a45810a7b0
 210
 3
diff --git a/contrib/devtools/chainparams/abc/chainparams_test.txt b/contrib/devtools/chainparams/abc/chainparams_test.txt
index 4fe2510d0..d936b8a4b 100644
--- a/contrib/devtools/chainparams/abc/chainparams_test.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_test.txt
@@ -1,4 +1,4 @@
-00000000000b7b6fb42cd0d349a31c5fd44cb0d4ef93c1c3f2ff1a2478020212
-00000000000000000000000000000000000000000000006e7fd4849bde5dc96c
+00000000000335ac5fd6bb5aa611f6ed619ee3c4ec30d0dd9512cbcc8593d723
+00000000000000000000000000000000000000000000006e800651f4387a0cfc
 55
 2
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index 08bcd4c76..289dcb39e 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("00000000000000009d4bdeafa84eff79850c61fcc2d211b9aa2fba4ffcce6e30");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000153e09093c1b0db4f837365");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000003f873e1d939dc32e4b59f06b735d6a4848e8fc54db97058a");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000153e9802ba062a45810a7b0");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 210;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
-    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000b7b6fb42cd0d349a31c5fd44cb0d4ef93c1c3f2ff1a2478020212");
-    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e7fd4849bde5dc96c");
+    const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000335ac5fd6bb5aa611f6ed619ee3c4ec30d0dd9512cbcc8593d723");
+    const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006e800651f4387a0cfc");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants