"Upgrading from 2.0.0":#v2_0_0
+h3. Removing libpam-arvados, replaced with libpam-arvados-go
+
+The Python-based PAM package has been replaced with a version written in Go. See "using PAM for authentication":{{site.baseurl}}/install/setup-login.html#pam for details.
+
h3. Removing sso-provider
The SSO (single sign-on) component is deprecated and will not be supported in future releases. Existing configurations will continue to work in this release, but you should switch to one of the built-in authentication mechanisms as soon as possible. See "setting up web based login":{{site.baseurl}}/install/setup-login.html for details.