diff --git a/app/requirements.txt b/app/requirements.txt
index 99966b6..c9a62ef 100644
--- a/app/requirements.txt
+++ b/app/requirements.txt
@@ -1,7 +1,7 @@
 Adafruit_BBIO==1.0.3
 itsdangerous==0.24
 requests==2.13.0
-pyserial==3.3
+pyserial==3.4
 
 peewee==2.10.1
 #netifaces