diff --git a/Cargo.lock b/Cargo.lock
index 8096e8dc2..99ddc245f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1508,7 +1508,7 @@ dependencies = [
 
 [[package]]
 name = "crab-runtime"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "array-bytes 7.1.0",
  "cumulus-pallet-aura-ext",
@@ -2504,7 +2504,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "array-bytes 7.1.0",
  "async-trait",
@@ -2589,7 +2589,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-account-migration"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "array-bytes 7.1.0",
  "darwinia-deposit",
@@ -2612,7 +2612,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-asset-limit"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -2623,7 +2623,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-common-runtime"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "array-bytes 7.1.0",
  "cumulus-primitives-core",
@@ -2654,7 +2654,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-deposit"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "darwinia-ethtx-forwarder",
  "dc-types",
@@ -2676,7 +2676,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-ethtx-forwarder"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "array-bytes 7.1.0",
  "ethabi",
@@ -2705,7 +2705,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-precompile-assets"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "fp-evm",
  "frame-support",
@@ -2726,7 +2726,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-precompile-state-storage"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "fp-evm",
  "frame-support",
@@ -2745,7 +2745,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-runtime"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "array-bytes 7.1.0",
  "cumulus-pallet-aura-ext",
@@ -2844,7 +2844,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-staking"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "darwinia-ethtx-forwarder",
  "dc-inflation",
@@ -2911,7 +2911,7 @@ dependencies = [
 
 [[package]]
 name = "dc-inflation"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "dc-types",
  "sp-arithmetic",
@@ -2920,7 +2920,7 @@ dependencies = [
 
 [[package]]
 name = "dc-primitives"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "dc-types",
  "fp-account",
@@ -2930,7 +2930,7 @@ dependencies = [
 
 [[package]]
 name = "dc-types"
-version = "6.8.1"
+version = "6.9.0"
 
 [[package]]
 name = "der"
@@ -5756,7 +5756,7 @@ checksum = "c33070833c9ee02266356de0c43f723152bd38bd96ddf52c82b3af10c9138b28"
 
 [[package]]
 name = "koi-runtime"
-version = "6.8.1"
+version = "6.9.0"
 dependencies = [
  "array-bytes 7.1.0",
  "cumulus-pallet-aura-ext",
diff --git a/Cargo.toml b/Cargo.toml
index 9521b6cb6..65ec00aac 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,7 +17,7 @@ edition    = "2021"
 homepage   = "https://darwinia.network"
 license    = "GPL-3.0"
 repository = "https://github.com/darwinia-network/darwinia"
-version    = "6.8.1"
+version    = "6.9.0"
 
 [workspace.dependencies]
 # crates.io
diff --git a/node/src/chain_spec/mod.rs b/node/src/chain_spec/mod.rs
index cf972084a..25f81b12d 100644
--- a/node/src/chain_spec/mod.rs
+++ b/node/src/chain_spec/mod.rs
@@ -138,8 +138,7 @@ where
 {
 	let d = env::current_exe().unwrap().parent().unwrap().to_path_buf();
 	let p = d.join(name);
-
-	if !p.is_file() {
+	let download = || {
 		println!("Downloading `{name}` to `{}`", d.display());
 
 		thread::spawn(move || {
@@ -156,6 +155,21 @@ where
 		})
 		.join()
 		.unwrap();
+	};
+
+	if !p.is_file() {
+		download();
+	} else if let Ok(metadata) = p.metadata() {
+		// Fetch the latest spec every 14 days.
+		if let Ok(date) = metadata.modified() {
+			if let Ok(elapsed) = date.elapsed() {
+				if elapsed.as_secs() > 60 * 60 * 24 * 14 {
+					if fs::remove_file(p.clone()).is_ok() {
+						download();
+					}
+				}
+			}
+		}
 	}
 
 	println!("Loading genesis from `{}`", p.display());
diff --git a/pallet/account-migration/src/mock.rs b/pallet/account-migration/src/mock.rs
index db9473750..6054239c4 100644
--- a/pallet/account-migration/src/mock.rs
+++ b/pallet/account-migration/src/mock.rs
@@ -28,7 +28,7 @@ pub const VERSION: sp_version::RuntimeVersion = sp_version::RuntimeVersion {
 	spec_name: sp_runtime::create_runtime_str!("Darwinia2"),
 	impl_name: sp_runtime::create_runtime_str!("DarwiniaOfficialRust"),
 	authoring_version: 0,
-	spec_version: 6_8_1_0,
+	spec_version: 6_9_0_0,
 	impl_version: 0,
 	apis: sp_version::create_apis_vec!([]),
 	transaction_version: 0,
diff --git a/runtime/crab/src/lib.rs b/runtime/crab/src/lib.rs
index de4e65409..95b19d806 100644
--- a/runtime/crab/src/lib.rs
+++ b/runtime/crab/src/lib.rs
@@ -84,7 +84,7 @@ pub const VERSION: sp_version::RuntimeVersion = sp_version::RuntimeVersion {
 	spec_name: sp_runtime::create_runtime_str!("Crab2"),
 	impl_name: sp_runtime::create_runtime_str!("DarwiniaOfficialRust"),
 	authoring_version: 0,
-	spec_version: 6_8_1_0,
+	spec_version: 6_9_0_0,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 0,
diff --git a/runtime/darwinia/src/lib.rs b/runtime/darwinia/src/lib.rs
index f432f27e5..54dd9da82 100644
--- a/runtime/darwinia/src/lib.rs
+++ b/runtime/darwinia/src/lib.rs
@@ -84,7 +84,7 @@ pub const VERSION: sp_version::RuntimeVersion = sp_version::RuntimeVersion {
 	spec_name: sp_runtime::create_runtime_str!("Darwinia2"),
 	impl_name: sp_runtime::create_runtime_str!("DarwiniaOfficialRust"),
 	authoring_version: 0,
-	spec_version: 6_8_1_0,
+	spec_version: 6_9_0_0,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 0,
diff --git a/runtime/koi/src/lib.rs b/runtime/koi/src/lib.rs
index 55df6f03b..9da7f1d0f 100644
--- a/runtime/koi/src/lib.rs
+++ b/runtime/koi/src/lib.rs
@@ -84,7 +84,7 @@ pub const VERSION: sp_version::RuntimeVersion = sp_version::RuntimeVersion {
 	spec_name: sp_runtime::create_runtime_str!("Darwinia Koi"),
 	impl_name: sp_runtime::create_runtime_str!("DarwiniaOfficialRust"),
 	authoring_version: 0,
-	spec_version: 6_8_1_1,
+	spec_version: 6_9_0_0,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 0,