I supposed npm1 needs an explicit install as well

.travis.yml

@@ -17,7 +17,7 @@ node_js:
 script:
  # Install peerDependencies on > npm3
  # When all dependencies declare bitcore-lib as a peerDependency this can be bumped up, but this matches the current ecosystem version expected by dependencies
- - if [ $(npm --version | sed 's/\..*//g') -ge 3 ]; then npm install bitcore-lib@^0.13.13; fi
+ - if [ $(npm --version | sed 's/\..*//g') -ne 2 ]; then npm install bitcore-lib@^0.13.13; fi
  - npm run regtest
  - npm run test
  - npm run jshint