flow error http 304

[Simobain]

When launching my webapp with gulp serve, in task "start tsd" i got this error

node_modules/tsd/build/http/CacheStreamLoader.js:180
throw new Error('flow error: http 304 but no local info on: ' + _this.request.url);
^
Error: flow error: http 304 but no local info on: https://api.github.com/repos/borisyankov/DefinitelyTyped/git/trees/00b6941c2a02ed67fb65d44cf16222cf32ffa9b9?recursive=1