diff --git a/node/src/chain/consensus.rs b/node/src/chain/consensus.rs
index bf0bd586be..5952c2962e 100644
--- a/node/src/chain/consensus.rs
+++ b/node/src/chain/consensus.rs
@@ -360,9 +360,9 @@ impl<DB: database::DB, VM: vm::VMExecution> Operations for Executor<DB, VM> {
         elapsed: Duration,
     ) -> Result<(), Error> {
         let db_key = match step_name {
-            StepName::Proposal => &MD_AVG_PROPOSAL[..],
-            StepName::Validation => &MD_AVG_VALIDATION[..],
-            StepName::Ratification => &MD_AVG_RATIFICATION[..],
+            StepName::Proposal => MD_AVG_PROPOSAL,
+            StepName::Validation => MD_AVG_VALIDATION,
+            StepName::Ratification => MD_AVG_RATIFICATION,
         };
 
         let db = self.db.read().await;
diff --git a/node/src/database/rocksdb.rs b/node/src/database/rocksdb.rs
index 218935c3e6..ac8bc69d1d 100644
--- a/node/src/database/rocksdb.rs
+++ b/node/src/database/rocksdb.rs
@@ -42,11 +42,11 @@ const MAX_MEMPOOL_SIZE: usize = 64 * 1024 * 1024; // 64 MiB
 const DB_FOLDER_NAME: &str = "chain.db";
 
 // List of supported metadata keys
-pub const MD_HASH_KEY: &[u8; 8] = b"hash_key";
-pub const MD_STATE_ROOT_KEY: &[u8; 14] = b"state_hash_key";
-pub const MD_AVG_VALIDATION: &[u8; 19] = b"avg_validation_time";
-pub const MD_AVG_RATIFICATION: &[u8; 21] = b"avg_ratification_time";
-pub const MD_AVG_PROPOSAL: &[u8; 17] = b"avg_proposal_time";
+pub const MD_HASH_KEY: &[u8] = b"hash_key";
+pub const MD_STATE_ROOT_KEY: &[u8] = b"state_hash_key";
+pub const MD_AVG_VALIDATION: &[u8] = b"avg_validation_time";
+pub const MD_AVG_RATIFICATION: &[u8] = b"avg_ratification_time";
+pub const MD_AVG_PROPOSAL: &[u8] = b"avg_proposal_time";
 
 #[derive(Clone)]
 pub struct Backend {