diff --git a/bitcoin/chainparams.c b/bitcoin/chainparams.c
index 592da1869..ea2593eb7 100644
--- a/bitcoin/chainparams.c
+++ b/bitcoin/chainparams.c
@@ -80,9 +80,14 @@ const struct chainparams networks[] = {
 			   .bip32_privkey_version = BIP32_VER_TEST_PRIVATE},
      .is_elements = false},
     {.network_name = "signet",
-     .bip173_name = "sb",
+     .bip173_name = "tb",
      .bip70_name = "signet",
-     .genesis_blockhash = {{{.u.u8 = {0xce, 0xbd, 0x8f, 0x6e, 0x69, 0x77, 0x30, 0xb7, 0x4c, 0x70, 0x9c, 0xdd, 0x1e, 0x6a, 0xba, 0xaf, 0x2a, 0xfc, 0x98, 0xbf, 0x4c, 0xff, 0xb2, 0x39, 0xf3, 0xdb, 0x44, 0x27, 0x64, 0x29, 0x00, 0x00}}}},
+     // 00000008819873e925422c1ff0f99f7cc9bbb232af63a077a480a3633bee1ef6
+     .genesis_blockhash = {{{.u.u8 = {0xf6, 0x1e, 0xee, 0x3b, 0x63, 0xa3, 0x80,
+				      0xa4, 0x77, 0xa0, 0x63, 0xaf, 0x32, 0xb2,
+				      0xbb, 0xc9, 0x7c, 0x9f, 0xf9, 0xf0, 0x1f,
+				      0x2c, 0x42, 0x25, 0xe9, 0x73, 0x98, 0x81,
+				      0x08, 0x00, 0x00, 0x00}}}},
      .rpc_port = 38332,
      .cli = "bitcoin-cli",
      .cli_args = "-signet",