diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index 52746675f9..35dd24f5a1 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -241,7 +241,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
     //   `spec_version`, and `authoring_version` are the same between Wasm and native.
     // This value is set to 100 to notify Polkadot-JS App (https://polkadot.js.org/apps) to use
     //   the compatible custom types.
-    spec_version: 365,
+    spec_version: 366,
     impl_version: 1,
     apis: RUNTIME_API_VERSIONS,
     transaction_version: 1,
@@ -362,7 +362,7 @@ impl pallet_aura::Config for Runtime {
     type AuthorityId = AuraId;
     type DisabledValidators = ();
     type MaxAuthorities = ConstU32<32>;
-    type AllowMultipleBlocksPerSlot = ConstBool<false>;
+    type AllowMultipleBlocksPerSlot = ConstBool<true>;
     type SlotDuration = pallet_aura::MinimumPeriodTimesTwo<Runtime>;
 }