diff --git a/update b/update
index d39d9791..51948413 100755
--- a/update
+++ b/update
@@ -12,7 +12,7 @@ if [ "$1" = "u" ]; then
 
 fi
 
-sudo apt-get install -y python3-smbus
+sudo apt-get install -y python3-smbus pigpio
 
 sudo sed -i 's/update.sh/update /g' /etc/motd