diff --git a/pezcumulus/pezkuwi-teyrchain/src/chain_spec/asset_hubs.rs b/pezcumulus/pezkuwi-teyrchain/src/chain_spec/asset_hubs.rs
index bf0b231c..8d61a3eb 100644
--- a/pezcumulus/pezkuwi-teyrchain/src/chain_spec/asset_hubs.rs
+++ b/pezcumulus/pezkuwi-teyrchain/src/chain_spec/asset_hubs.rs
@@ -132,10 +132,11 @@ pub fn asset_hub_pezkuwichain_genesis_config() -> GenericChainSpec {
 	let mut properties = pezsc_chain_spec::Properties::new();
 	properties.insert("tokenSymbol".into(), "TYR".into());
 	properties.insert("tokenDecimals".into(), 12.into());
+	properties.insert("ss58Format".into(), 42.into());
 	GenericChainSpec::builder(
 		asset_hub_pezkuwichain_runtime::WASM_BINARY
 			.expect("WASM binary was not built, please build it!"),
-		Extensions::new_with_relay_chain("pezkuwichain-mainnet".into()),
+		Extensions::new("pezkuwichain-mainnet".into(), 1000),
 	)
 	.with_name("Pezkuwichain Asset Hub")
 	.with_id("asset-hub-pezkuwichain")
diff --git a/pezcumulus/pezkuwi-teyrchain/src/chain_spec/people.rs b/pezcumulus/pezkuwi-teyrchain/src/chain_spec/people.rs
index 9243159b..5dc67e02 100644
--- a/pezcumulus/pezkuwi-teyrchain/src/chain_spec/people.rs
+++ b/pezcumulus/pezkuwi-teyrchain/src/chain_spec/people.rs
@@ -140,7 +140,7 @@ pub mod pezkuwichain {
 		GenericChainSpec::builder(
 			people_pezkuwichain_runtime::WASM_BINARY
 				.expect("WASM binary was not built, please build it!"),
-			Extensions::new_with_relay_chain("pezkuwichain-mainnet".to_string()),
+			Extensions::new("pezkuwichain-mainnet".to_string(), 1004),
 		)
 		.with_name("Pezkuwichain People")
 		.with_id(super::ensure_id(PEOPLE_PEZKUWICHAIN_GENESIS).expect("invalid id"))
diff --git a/pezkuwi/node/service/src/chain_spec.rs b/pezkuwi/node/service/src/chain_spec.rs
index ce1a3a57..43816a2b 100644
--- a/pezkuwi/node/service/src/chain_spec.rs
+++ b/pezkuwi/node/service/src/chain_spec.rs
@@ -164,10 +164,11 @@ pub fn versi_chain_spec_properties() -> serde_json::map::Map<String, serde_json:
 }
 
 /// PezkuwiChain mainnet chain spec properties (HEZ token)
+/// Note: tokenDecimals must be 12 to match UNITS = 10^12 in runtime constants
 pub fn pezkuwichain_chain_spec_properties() -> serde_json::map::Map<String, serde_json::Value> {
 	serde_json::json!({
 		"ss58Format": 42,
-		"tokenDecimals": 18,
+		"tokenDecimals": 12,
 		"tokenSymbol": "HEZ",
 	})
 	.as_object()