diff --git a/src/Nest/XPack/Slm/SnapshotLifecyclePolicyMetadata.cs b/src/Nest/XPack/Slm/SnapshotLifecyclePolicyMetadata.cs
index 33a3cb8840e..53d5f073d4d 100644
--- a/src/Nest/XPack/Slm/SnapshotLifecyclePolicyMetadata.cs
+++ b/src/Nest/XPack/Slm/SnapshotLifecyclePolicyMetadata.cs
@@ -11,29 +11,17 @@ public class SnapshotLifecyclePolicyMetadata
 	{
 		/// <summary>
 		/// The modified date.
-		/// Returned only when Human is set to <c>true</c> on the request
-		/// </summary>
-		[DataMember(Name = "modified_date")]
-		public DateTimeOffset? ModifiedDate { get; internal set; }
-
-		/// <summary>
-		/// The modified date in milliseconds
 		/// </summary>
 		[DataMember(Name = "modified_date_millis")]
-		public long ModifiedDateInMilliseconds { get; internal set; }
+		[JsonFormatter(typeof(DateTimeOffsetEpochMillisecondsFormatter))]
+		public DateTimeOffset ModifiedDate { get; internal set; }
 
 		/// <summary>
 		/// The next execution date.
-		/// Returned only when Human is set to <c>true</c> on the request
-		/// </summary>
-		[DataMember(Name = "next_execution")]
-		public DateTimeOffset? NextExecution { get; internal set; }
-
-		/// <summary>
-		/// The next execution date in milliseconds
 		/// </summary>
 		[DataMember(Name = "next_execution_millis")]
-		public long NextExecutionInMilliseconds { get; internal set; }
+		[JsonFormatter(typeof(DateTimeOffsetEpochMillisecondsFormatter))]
+		public DateTimeOffset NextExecution { get; internal set; }
 
 		/// <summary>
 		/// The snapshot lifecycle policy
@@ -51,7 +39,7 @@ public class SnapshotLifecyclePolicyMetadata
 		/// If a snapshot is currently in progress this will return information about the snapshot.
 		/// </summary>
 		[DataMember(Name = "in_progress")]
-		public LifecycleSnapshotInProgress InProgress { get; internal set; }
+		public SnapshotLifecycleInProgress InProgress { get; internal set; }
 
 		/// <summary>
 		///	 Information about the last time the policy successfully initiated a snapshot.
@@ -80,13 +68,13 @@ public class SnapshotLifecycleInvocationRecord
 	/// If a snapshot is in progress when calling the Get Snapshot Lifecycle metadata
 	/// this will hold some minimal information about the in flight snapshot
 	/// </summary>
-	public class LifecycleSnapshotInProgress
+	public class SnapshotLifecycleInProgress
 	{
 		/// <summary> The name of the snapshot currently being taken </summary>
 		[DataMember(Name = "name")]
 		public string Name { get; internal set; }
 
-		/// <summary> The UUI of the snapshot currently being taken </summary>
+		/// <summary> The UUID of the snapshot currently being taken </summary>
 		[DataMember(Name = "uuid")]
 		public string UUID { get; internal set; }
 
@@ -98,6 +86,5 @@ public class LifecycleSnapshotInProgress
 		[DataMember(Name = "start_time_millis")]
 		[JsonFormatter(typeof(DateTimeOffsetEpochMillisecondsFormatter))]
 		public DateTimeOffset StartTime { get; internal set; }
-
 	}
 }
diff --git a/src/Tests/Tests/XPack/Slm/SlmApiTests.cs b/src/Tests/Tests/XPack/Slm/SlmApiTests.cs
index ad8ee659f19..095ad1d6b55 100644
--- a/src/Tests/Tests/XPack/Slm/SlmApiTests.cs
+++ b/src/Tests/Tests/XPack/Slm/SlmApiTests.cs
@@ -153,9 +153,7 @@ [I] public async Task GetSnapshotLifecycleResponse() => await Assert<GetSnapshot
 
 			metadata.Version.Should().Be(1);
 			metadata.ModifiedDate.Should().BeAfter(DateTimeOffset.MinValue);
-			metadata.ModifiedDateInMilliseconds.Should().BeGreaterThan(0);
 			metadata.NextExecution.Should().BeAfter(DateTimeOffset.MinValue);
-			metadata.NextExecutionInMilliseconds.Should().BeGreaterThan(0);
 			metadata.Policy.Name.Should().Be(v);
 			metadata.Policy.Repository.Should().Be(v);
 			metadata.Policy.Schedule.Should().BeEquivalentTo(new CronExpression("0 0 0 1 1 ? *"));