diff --git a/lib/mock/http.js b/lib/mock/http.js
index 7d4dd0b2..7d59c330 100644
--- a/lib/mock/http.js
+++ b/lib/mock/http.js
@@ -14,7 +14,7 @@ log.heading = 'node-pre-gyp'; // differentiate node-pre-gyp's logs from npm's
 function http_mock() {
   log.warn('mocking http requests to s3');
 
-  const baseHostname = 's3.us-east-1.amazonaws.com';
+  const baseHostname = 's3\.us-east-1\.amazonaws\.com';
   const basePath = `${os.tmpdir()}/mock`;
 
   nock(new RegExp('^\.*' + baseHostname))