diff --git a/Fedora-Workstation-39.sh b/Fedora-Workstation-39.sh
index 5ace1fd..924bc9f 100644
--- a/Fedora-Workstation-39.sh
+++ b/Fedora-Workstation-39.sh
@@ -54,6 +54,9 @@ sudo firewall-cmd --permanent --add-service=dhcpv6-client
 sudo firewall-cmd --reload
 sudo firewall-cmd --lockdown-on
 
+# Remove nullok
+sudo /usr/bin/sed -i 's/\s+nullok//g' /etc/pam.d/system-auth
+
 # Harden SSH
 unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/ssh/ssh_config.d/10-custom.conf | sudo tee /etc/ssh/ssh_config.d/10-custom.conf
 sudo chmod 644 /etc/ssh/ssh_config.d/10-custom.conf
diff --git a/RHEL-Server-9.sh b/RHEL-Server-9.sh
index 23e459e..6d2ee22 100644
--- a/RHEL-Server-9.sh
+++ b/RHEL-Server-9.sh
@@ -41,6 +41,9 @@ sudo firewall-cmd --permanent --remove-service=cockpit
 sudo firewall-cmd --reload
 sudo firewall-cmd --lockdown-on
 
+# Remove nullok
+sudo /usr/bin/sed -i 's/\s+nullok//g' /etc/pam.d/system-auth
+
 # Harden SSH
 unpriv curl https://raw.githubusercontent.com/TommyTran732/Linux-Setup-Scripts/main/etc/ssh/sshd_config.d/10-custom.conf | sudo tee /etc/ssh/sshd_config.d/10-custom.conf
 sudo chmod 644 /etc/ssh/sshd_config.d/10-custom.conf