diff --git a/requirements.txt b/requirements.txt
index 6e09dd7e..478067b5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,3 +7,4 @@ pyserial==3.4
 ed25519==1.4
 cbor==1.0.0
 cryptography==2.6.1
+scapy>=2.4.3