diff --git a/bin/runtime/src/lib.rs b/bin/runtime/src/lib.rs
index 586c6bb434..b87905b710 100644
--- a/bin/runtime/src/lib.rs
+++ b/bin/runtime/src/lib.rs
@@ -104,7 +104,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
     spec_name: create_runtime_str!("aleph-node"),
     impl_name: create_runtime_str!("aleph-node"),
     authoring_version: 1,
-    spec_version: 46,
+    spec_version: 47,
     impl_version: 1,
     apis: RUNTIME_API_VERSIONS,
     transaction_version: 14,
@@ -678,9 +678,9 @@ impl pallet_contracts::Config for Runtime {
     type DeletionQueueDepth = DeletionQueueDepth;
     type DeletionWeightLimit = DeletionWeightLimit;
     type Schedule = Schedule;
-    type CallStack = [pallet_contracts::Frame<Self>; 31];
+    type CallStack = [pallet_contracts::Frame<Self>; 5];
     type AddressGenerator = pallet_contracts::DefaultAddressGenerator;
-    type MaxCodeLen = ConstU32<{ 128 * 1024 }>;
+    type MaxCodeLen = ConstU32<{ 123 * 1024 }>;
     type MaxStorageKeyLen = ConstU32<128>;
 }