diff --git a/runtime/crab/src/lib.rs b/runtime/crab/src/lib.rs
index 627443414..8d00bfa1d 100644
--- a/runtime/crab/src/lib.rs
+++ b/runtime/crab/src/lib.rs
@@ -190,7 +190,7 @@ impl_self_contained_call!();
 sp_api::impl_runtime_apis! {
 	impl sp_consensus_aura::AuraApi<Block, sp_consensus_aura::sr25519::AuthorityId> for Runtime {
 		fn slot_duration() -> sp_consensus_aura::SlotDuration {
-			sp_consensus_aura::SlotDuration::from_millis(Aura::slot_duration())
+			sp_consensus_aura::SlotDuration::from_millis(SLOT_DURATION)
 		}
 
 		fn authorities() -> Vec<sp_consensus_aura::sr25519::AuthorityId> {
diff --git a/runtime/darwinia/src/lib.rs b/runtime/darwinia/src/lib.rs
index dc23af212..a0e9552cf 100644
--- a/runtime/darwinia/src/lib.rs
+++ b/runtime/darwinia/src/lib.rs
@@ -195,7 +195,7 @@ impl_self_contained_call!();
 sp_api::impl_runtime_apis! {
 	impl sp_consensus_aura::AuraApi<Block, sp_consensus_aura::sr25519::AuthorityId> for Runtime {
 		fn slot_duration() -> sp_consensus_aura::SlotDuration {
-			sp_consensus_aura::SlotDuration::from_millis(Aura::slot_duration())
+			sp_consensus_aura::SlotDuration::from_millis(SLOT_DURATION)
 		}
 
 		fn authorities() -> Vec<sp_consensus_aura::sr25519::AuthorityId> {
diff --git a/runtime/pangolin/src/lib.rs b/runtime/pangolin/src/lib.rs
index d6ffd74b9..f0b77e079 100644
--- a/runtime/pangolin/src/lib.rs
+++ b/runtime/pangolin/src/lib.rs
@@ -75,7 +75,7 @@ pub const VERSION: sp_version::RuntimeVersion = sp_version::RuntimeVersion {
 	spec_name: sp_runtime::create_runtime_str!("Pangolin2"),
 	impl_name: sp_runtime::create_runtime_str!("DarwiniaOfficialRust"),
 	authoring_version: 0,
-	spec_version: 6_6_3_0,
+	spec_version: 6_6_3_1,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 0,
@@ -194,7 +194,7 @@ impl_self_contained_call!();
 sp_api::impl_runtime_apis! {
 	impl sp_consensus_aura::AuraApi<Block, sp_consensus_aura::sr25519::AuthorityId> for Runtime {
 		fn slot_duration() -> sp_consensus_aura::SlotDuration {
-			sp_consensus_aura::SlotDuration::from_millis(Aura::slot_duration())
+			sp_consensus_aura::SlotDuration::from_millis(SLOT_DURATION)
 		}
 
 		fn authorities() -> Vec<sp_consensus_aura::sr25519::AuthorityId> {