diff --git a/RNS/Packet.py b/RNS/Packet.py
index 14ad097..7e10a84 100755
--- a/RNS/Packet.py
+++ b/RNS/Packet.py
@@ -106,6 +106,11 @@ class Packet:
 
     TIMEOUT_PER_HOP = RNS.Reticulum.DEFAULT_PER_HOP_TIMEOUT
 
+    __slots__  = "hops", "header", "header_type", "packet_type", "transport_type", "context", "context_flag", "destination"
+    __slots__ += "transport_id", "data", "flags", "raw", "packed", "sent", "create_receipt", "receipt", "fromPacked", "MTU"
+    __slots__ += "sent_at", "packet_hash", "ratchet_id", "attached_interface", "receiving_interface", "rssi", "snr", "q"
+    __slots__ += "ciphertext", "plaintext", "destination_hash", "destination_type", "link", "map_hash"
+
     def __init__(self, destination, data, packet_type = DATA, context = NONE, transport_type = RNS.Transport.BROADCAST,
                  header_type = HEADER_1, transport_id = None, attached_interface = None, create_receipt = True, context_flag=FLAG_UNSET):