diff --git a/source/_docs/security/porosity.markdown b/source/_docs/security/porosity.markdown
index 72f61ad4e11..6da453ee98d 100644
--- a/source/_docs/security/porosity.markdown
+++ b/source/_docs/security/porosity.markdown
@@ -5,7 +5,7 @@ description: "Use nmap to scan your Home Assistant instance."
 
 As a large amount of users are running [Hass.io](/hassio/), here we are using a Raspberry Pi 3 B and Hass.io 0.70.0 to show how Home Assistant looks from the network side. This is not a full blown investigation, just a quick overview.
 
-The IP address of the Home Assistant machine is 192.168.0.215. The system which is the source of the scans is a machine running Fedora 27 and Nmap 7.60 is used to preform the port scans. Both systems are in the same network.
+The IP address of the Home Assistant machine is 192.168.0.215. The system which is the source of the scans is a machine running Fedora 27 and Nmap 7.60 is used to perform the port scans. Both systems are in the same network.
 
 ## SSH server Add-on