lock package.json version at deeper level using npm shrinkwrap -

is possible lock package.json on deeper dependency level of npm module

for ex :

koa@0.2.0   ├── accepts@1.0.7   ├── co@3.0.6   ├── cookies@0.3.8   ├── debug@2.6.8   ├── fresh@0.2.4   ├── keygrip@1.0.1   ├── koa-compose@2.1.0   ├── mime@1.2.11   ├── mime-types@1.0.2   ├── ms@2.0.0   ├── negotiator@0.4.7   ├── on-socket-error@1.0.1   └── type-is@1.0.1 

so need lock on dependency dependent on koa@0.2.0.