diff --git a/polkadot/Cargo.lock b/polkadot/Cargo.lock
index 99c3842b94..c193a83612 100644
--- a/polkadot/Cargo.lock
+++ b/polkadot/Cargo.lock
@@ -7560,6 +7560,7 @@ dependencies = [
  "sc-telemetry",
  "sc-transaction-pool",
  "serde",
+ "serde_json",
  "sp-api",
  "sp-authority-discovery",
  "sp-block-builder",
diff --git a/polkadot/node/service/Cargo.toml b/polkadot/node/service/Cargo.toml
index c07df95e9a..bc997bc111 100644
--- a/polkadot/node/service/Cargo.toml
+++ b/polkadot/node/service/Cargo.toml
@@ -64,6 +64,7 @@ futures = "0.3.21"
 hex-literal = "0.3.4"
 gum = { package = "tracing-gum", path = "../gum/" }
 serde = { version = "1.0.136", features = ["derive"] }
+serde_json = "1.0.59"
 thiserror = "1.0.30"
 kvdb = "0.11.0"
 kvdb-rocksdb = { version = "0.15.2", optional = true }
diff --git a/polkadot/node/service/src/chain_spec.rs b/polkadot/node/service/src/chain_spec.rs
index 2456640e22..f87ad97c2e 100644
--- a/polkadot/node/service/src/chain_spec.rs
+++ b/polkadot/node/service/src/chain_spec.rs
@@ -1085,6 +1085,16 @@ fn rococo_staging_testnet_config_genesis(wasm_binary: &[u8]) -> rococo_runtime::
 	}
 }
 
+/// Returns the properties for the [`PolkadotChainSpec`].
+pub fn polkadot_chain_spec_properties() -> serde_json::map::Map<String, serde_json::Value> {
+	serde_json::json!({
+		"tokenDecimals": 10,
+	})
+	.as_object()
+	.expect("Map given; qed")
+	.clone()
+}
+
 /// Polkadot staging testnet config.
 #[cfg(feature = "polkadot-native")]
 pub fn polkadot_staging_testnet_config() -> Result<PolkadotChainSpec, String> {
@@ -1103,7 +1113,7 @@ pub fn polkadot_staging_testnet_config() -> Result<PolkadotChainSpec, String> {
 		),
 		Some(DEFAULT_PROTOCOL_ID),
 		None,
-		None,
+		Some(polkadot_chain_spec_properties()),
 		Default::default(),
 	))
 }
@@ -1653,7 +1663,7 @@ pub fn polkadot_development_config() -> Result<PolkadotChainSpec, String> {
 		None,
 		Some(DEFAULT_PROTOCOL_ID),
 		None,
-		None,
+		Some(polkadot_chain_spec_properties()),
 		Default::default(),
 	))
 }
@@ -1793,7 +1803,7 @@ pub fn polkadot_local_testnet_config() -> Result<PolkadotChainSpec, String> {
 		None,
 		Some(DEFAULT_PROTOCOL_ID),
 		None,
-		None,
+		Some(polkadot_chain_spec_properties()),
 		Default::default(),
 	))
 }
diff --git a/polkadot/node/test/service/src/chain_spec.rs b/polkadot/node/test/service/src/chain_spec.rs
index 5e81522994..1d8b300e4e 100644
--- a/polkadot/node/test/service/src/chain_spec.rs
+++ b/polkadot/node/test/service/src/chain_spec.rs
@@ -20,7 +20,9 @@ use babe_primitives::AuthorityId as BabeId;
 use grandpa::AuthorityId as GrandpaId;
 use pallet_staking::Forcing;
 use polkadot_primitives::v2::{AccountId, AssignmentId, ValidatorId, MAX_CODE_SIZE, MAX_POV_SIZE};
-use polkadot_service::chain_spec::{get_account_id_from_seed, get_from_seed, Extensions};
+use polkadot_service::chain_spec::{
+	get_account_id_from_seed, get_from_seed, polkadot_chain_spec_properties, Extensions,
+};
 use polkadot_test_runtime::BABE_GENESIS_EPOCH_CONFIG;
 use sc_chain_spec::{ChainSpec, ChainType};
 use sp_authority_discovery::AuthorityId as AuthorityDiscoveryId;
@@ -45,7 +47,7 @@ pub fn polkadot_local_testnet_config() -> PolkadotChainSpec {
 		None,
 		Some(DEFAULT_PROTOCOL_ID),
 		None,
-		None,
+		Some(polkadot_chain_spec_properties()),
 		Default::default(),
 	)
 }