diff --git a/node/src/chainspec/testnet.rs b/node/src/chainspec/testnet.rs
index 334aa7aeb..639ef9efc 100644
--- a/node/src/chainspec/testnet.rs
+++ b/node/src/chainspec/testnet.rs
@@ -93,7 +93,7 @@ pub fn local_testnet_config(chain_id: u64) -> Result<ChainSpec, String> {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("tokenSymbol".into(), "tTNT".into());
 	properties.insert("tokenDecimals".into(), 18u32.into());
-	properties.insert("ss58Format".into(), tangle_primitives::TESTNET_SS58_PREFIX.into());
+	properties.insert("ss58Format".into(), 42.into());
 
 	Ok(ChainSpec::from_genesis(
 		// Name
@@ -151,7 +151,7 @@ pub fn tangle_testnet_config(chain_id: u64) -> Result<ChainSpec, String> {
 	let mut properties = sc_chain_spec::Properties::new();
 	properties.insert("tokenSymbol".into(), "tTNT".into());
 	properties.insert("tokenDecimals".into(), 18u32.into());
-	properties.insert("ss58Format".into(), tangle_primitives::TESTNET_SS58_PREFIX.into());
+	properties.insert("ss58Format".into(), 42.into());
 
 	Ok(ChainSpec::from_genesis(
 		"Tangle Testnet",
diff --git a/runtime/testnet/src/lib.rs b/runtime/testnet/src/lib.rs
index c2d053dac..9af39bbea 100644
--- a/runtime/testnet/src/lib.rs
+++ b/runtime/testnet/src/lib.rs
@@ -179,7 +179,7 @@ parameter_types! {
 		::with_sensible_defaults(MAXIMUM_BLOCK_WEIGHT, NORMAL_DISPATCH_RATIO);
 	pub BlockLength: frame_system::limits::BlockLength = frame_system::limits::BlockLength
 		::max_with_normal_ratio(MAXIMUM_BLOCK_LENGTH, NORMAL_DISPATCH_RATIO);
-	pub const SS58Prefix: u16 = tangle_primitives::TESTNET_SS58_PREFIX;
+	pub const SS58Prefix: u8 = 42;
 }
 
 /// Opaque types. These are used by the CLI to instantiate machinery that don't need to know