diff --git a/bitcoin/src/blockdata/constants.rs b/bitcoin/src/blockdata/constants.rs
index 978dc1c2..544350c5 100644
--- a/bitcoin/src/blockdata/constants.rs
+++ b/bitcoin/src/blockdata/constants.rs
@@ -37,13 +37,17 @@ pub const WITNESS_SCALE_FACTOR: usize = 4;
 /// The maximum allowed number of signature check operations in a block.
 pub const MAX_BLOCK_SIGOPS_COST: i64 = 80_000;
 /// Mainnet (bitcoin) pubkey address prefix.
-pub const PUBKEY_ADDRESS_PREFIX_MAIN: u8 = 0; // 0x00
+// pub const PUBKEY_ADDRESS_PREFIX_MAIN: u8 = 0; // 0x00
+pub const PUBKEY_ADDRESS_PREFIX_MAIN: u8 = 18; // 0x12 (defichain)
 /// Mainnet (bitcoin) script address prefix.
-pub const SCRIPT_ADDRESS_PREFIX_MAIN: u8 = 5; // 0x05
+// pub const SCRIPT_ADDRESS_PREFIX_MAIN: u8 = 5; // 0x05
+pub const SCRIPT_ADDRESS_PREFIX_MAIN: u8 = 90; // 0x5a (defichain)
 /// Test (tesnet, signet, regtest) pubkey address prefix.
-pub const PUBKEY_ADDRESS_PREFIX_TEST: u8 = 111; // 0x6f
+// pub const PUBKEY_ADDRESS_PREFIX_TEST: u8 = 111; // 0x6f
+pub const PUBKEY_ADDRESS_PREFIX_TEST: u8 = 15; // 0xf (defichain)
 /// Test (tesnet, signet, regtest) script address prefix.
-pub const SCRIPT_ADDRESS_PREFIX_TEST: u8 = 196; // 0xc4
+// pub const SCRIPT_ADDRESS_PREFIX_TEST: u8 = 196; // 0xc4
+pub const SCRIPT_ADDRESS_PREFIX_TEST: u8 = 128; // 0x80 (defichain)
 /// The maximum allowed script size.
 pub const MAX_SCRIPT_ELEMENT_SIZE: usize = 520;
 /// How may blocks between halvings.