After running npm install iptrie with node 10.15.2 and npm 5.8.0 ../src/iptrie.cc:181:42: error: no matching function for call to ‘v8::Value::ToUint32()’ int prefix_len = args[1]->ToUint32()->Value(); I patched my local like so - int prefix_len = args[1]->ToUint32()->Value(); + int prefix_len = args[1]->IntegerValue(); on lines 182 and 211 (diff attached) [git-diff.txt](https://github.com/postwait/node-iptrie/files/4541736/git-diff.txt)