diff --git a/crates/iota-core/Cargo.toml b/crates/iota-core/Cargo.toml
index 650aabf8f4b..8138aea0c46 100644
--- a/crates/iota-core/Cargo.toml
+++ b/crates/iota-core/Cargo.toml
@@ -104,8 +104,8 @@ num-bigint.workspace = true
 pretty_assertions.workspace = true
 rstest.workspace = true
 serde-reflection.workspace = true
-tower.workspace = true
 serde_yaml.workspace = true
+tower.workspace = true
 
 # internal dependencies
 iota-move.workspace = true
diff --git a/crates/iota-core/src/authority/authority_per_epoch_store.rs b/crates/iota-core/src/authority/authority_per_epoch_store.rs
index ed95b214216..21a928bfb59 100644
--- a/crates/iota-core/src/authority/authority_per_epoch_store.rs
+++ b/crates/iota-core/src/authority/authority_per_epoch_store.rs
@@ -33,7 +33,7 @@ use iota_types::{
     authenticator_state::{ActiveJwk, get_authenticator_state},
     base_types::{
         AuthorityName, CommitRound, ConciseableName, EpochId, ObjectID, ObjectRef, SequenceNumber,
-        TimestampMs, TransactionDigest,
+        TransactionDigest,
     },
     committee::{Committee, CommitteeTrait},
     crypto::{AuthoritySignInfo, AuthorityStrongQuorumSignInfo, RandomnessRound},
@@ -103,7 +103,7 @@ use crate::{
     epoch::{
         epoch_metrics::EpochMetrics,
         randomness::{
-            DkgStatus, RandomnessManager, RandomnessReporter, SINGLETON_KEY,
+            DkgStatus, RandomnessManager, RandomnessReporter, SINGLETON_KEY, CommitTimestampMs,
             VersionedProcessedMessage, VersionedUsedProcessedMessages,
         },
         reconfiguration::ReconfigState,
@@ -598,7 +598,7 @@ pub struct AuthorityEpochTables {
     pub(crate) randomness_highest_completed_round: DBMap<u64, RandomnessRound>,
 
     /// Holds the timestamp of the most recently generated round of randomness.
-    pub(crate) randomness_last_round_timestamp: DBMap<u64, TimestampMs>,
+    pub(crate) randomness_last_round_timestamp: DBMap<u64, CommitTimestampMs>,
 }
 
 fn signed_transactions_table_default_config() -> DBOptions {
@@ -3839,7 +3839,7 @@ pub(crate) struct ConsensusCommitOutput {
     pending_checkpoints: Vec<PendingCheckpoint>,
 
     // random beacon state
-    next_randomness_round: Option<(RandomnessRound, TimestampMs)>,
+    next_randomness_round: Option<(RandomnessRound, CommitTimestampMs)>,
 
     dkg_confirmations: BTreeMap<PartyId, VersionedDkgConfirmation>,
     dkg_processed_messages: BTreeMap<PartyId, VersionedProcessedMessage>,
@@ -3917,7 +3917,7 @@ impl ConsensusCommitOutput {
     pub fn reserve_next_randomness_round(
         &mut self,
         next_randomness_round: RandomnessRound,
-        commit_timestamp: TimestampMs,
+        commit_timestamp: CommitTimestampMs,
     ) {
         assert!(self.next_randomness_round.is_none());
         self.next_randomness_round = Some((next_randomness_round, commit_timestamp));
diff --git a/crates/iota-core/src/epoch/randomness.rs b/crates/iota-core/src/epoch/randomness.rs
index 71d4e7d04cb..e63f4f2a4e8 100644
--- a/crates/iota-core/src/epoch/randomness.rs
+++ b/crates/iota-core/src/epoch/randomness.rs
@@ -21,7 +21,7 @@ use futures::{StreamExt, stream::FuturesUnordered};
 use iota_macros::fail_point_if;
 use iota_network::randomness;
 use iota_types::{
-    base_types::{AuthorityName, CommitRound, TimestampMs},
+    base_types::{AuthorityName, CommitRound},
     committee::{Committee, EpochId, StakeUnit},
     crypto::{AuthorityKeyPair, RandomnessRound},
     error::{IotaError, IotaResult},
@@ -46,6 +46,9 @@ use crate::{
     consensus_adapter::SubmitToConsensus,
 };
 
+/// The epoch UNIX timestamp in milliseconds
+pub type CommitTimestampMs = u64;
+
 type PkG = bls12381::G2Element;
 type EncG = bls12381::G2Element;
 
@@ -689,7 +692,7 @@ impl RandomnessManager {
     /// be resumed.
     pub(crate) fn reserve_next_randomness(
         &mut self,
-        commit_timestamp: TimestampMs,
+        commit_timestamp: CommitTimestampMs,
         output: &mut ConsensusCommitOutput,
     ) -> IotaResult<Option<RandomnessRound>> {
         let epoch_store = self.epoch_store()?;
diff --git a/crates/iota-types/src/base_types.rs b/crates/iota-types/src/base_types.rs
index 53dcaf67948..a557ddb80ff 100644
--- a/crates/iota-types/src/base_types.rs
+++ b/crates/iota-types/src/base_types.rs
@@ -117,9 +117,6 @@ pub type VersionNumber = SequenceNumber;
 /// The round number.
 pub type CommitRound = u64;
 
-/// The epoch UNIX timestamp in milliseconds
-pub type TimestampMs = u64;
-
 #[derive(Eq, PartialEq, Ord, PartialOrd, Clone, Hash, Default, Debug, Serialize, Deserialize)]
 pub struct UserData(pub Option<[u8; 32]>);