```ruby
# Add the opscode APT source for chef
default[:apt][:sources] = node[:apt][:sources] | [ "opscode" ]

# Set the default server version
default[:chef][:server][:version] = "11.1.3-1"

# Set the default client version
default[:chef][:client][:version] = "11.12.8-2"

# A list of gems needed by chef recipes
default[:chef][:gems] = []
```

Update chef client to 11.16.0-1
user
```ruby
# Add the opscode APT source for chef
default[:apt][:sources] = node[:apt][:sources] | [ "opscode" ]

# Set the default server version
default[:chef][:server][:version] = "11.1.3-1"

# Set the default client version
default[:chef][:client][:version] = "11.16.0-1"

# A list of gems needed by chef recipes
default[:chef][:gems] = []
```
assistant