diff --git a/.config/zsh/zshrc.d/90-external-plugins/15-powerlevel10k.theme b/.config/zsh/zshrc.d/90-external-plugins/15-powerlevel10k.theme
index d5430a2..c68d564 100644
--- a/.config/zsh/zshrc.d/90-external-plugins/15-powerlevel10k.theme
+++ b/.config/zsh/zshrc.d/90-external-plugins/15-powerlevel10k.theme
@@ -1385,7 +1385,7 @@
   # typeset -g POWERLEVEL9K_VPN_IP_CONTENT_EXPANSION=
   # Regular expression for the VPN network interface. Run `ifconfig` or `ip -4 a show` while on VPN
   # to see the name of the interface.
-  typeset -g POWERLEVEL9K_VPN_IP_INTERFACE='(wg|(.*tun)|vpn)[0-9]*'
+  typeset -g POWERLEVEL9K_VPN_IP_INTERFACE='(wg|(.*tun)|vpn|proton)[0-9]*'
   # If set to true, show one segment per matching network interface. If set to false, show only
   # one segment corresponding to the first matching network interface.
   # Tip: If you set it to true, you'll probably want to unset POWERLEVEL9K_VPN_IP_CONTENT_EXPANSION.