diff --git a/rpc/ws/slotsUpdatesSubscribe.go b/rpc/ws/slotsUpdatesSubscribe.go
index 11931b4f..0dd8621d 100644
--- a/rpc/ws/slotsUpdatesSubscribe.go
+++ b/rpc/ws/slotsUpdatesSubscribe.go
@@ -22,7 +22,7 @@ type SlotsUpdatesResult struct {
 	// The newly updated slot.
 	Slot uint64 `json:"slot"`
 	// The Unix timestamp of the update.
-	Timestamp *solana.UnixTimeSeconds `json:"timestamp"`
+	Timestamp *solana.UnixTimeMilliseconds `json:"timestamp"`
 	// The update type.
 	Type SlotsUpdatesType `json:"type"`
 }
diff --git a/types.go b/types.go
index 308d0c49..a22a8184 100644
--- a/types.go
+++ b/types.go
@@ -32,6 +32,17 @@ func (res UnixTimeSeconds) String() string {
 	return res.Time().String()
 }
 
+// UnixTimeMilliseconds represents a UNIX millisecond-resolution timestamp.
+type UnixTimeMilliseconds int64
+
+func (res UnixTimeMilliseconds) Time() time.Time {
+	return time.Unix(0, int64(res)*int64(time.Millisecond))
+}
+
+func (res UnixTimeMilliseconds) String() string {
+	return res.Time().String()
+}
+
 type DurationSeconds int64
 
 func (res DurationSeconds) Duration() time.Duration {