diff --git a/rpc/subscription.go b/rpc/subscription.go
index 9e400c8b60..d3ee1b5f4b 100644
--- a/rpc/subscription.go
+++ b/rpc/subscription.go
@@ -64,7 +64,8 @@ func randomIDGenerator() func() ID {
 	if _, err := crand.Read(buf); err == nil {
 		seed = int64(binary.BigEndian.Uint64(buf))
 	} else {
-		seed = int64(time.Now().Nanosecond())
+		// Fallback: use UnixNano for higher entropy than Nanosecond-only value
+		seed = time.Now().UnixNano()
 	}
 
 	var (