diff --git a/backup.js b/backup.js
index 79e2e9a..ceaae87 100644
--- a/backup.js
+++ b/backup.js
@@ -2,6 +2,7 @@ var AWS = require('aws-sdk');
 var Dyno = require('dyno');
 var stream = require('stream');
 var zlib = require('zlib');
+var joinPath = require('path.join');
 
 module.exports = function(config, done) {
     var primary = Dyno(config);
@@ -16,7 +17,7 @@ module.exports = function(config, done) {
             return done(new Error('Must provide a bucket, prefix and jobid for backups'));
 
     var index = !isNaN(parseInt(config.segment)) ? config.segment.toString() : 0;
-    var key = [config.backup.prefix, config.backup.jobid, index].join('/');
+    var key = joinPath(config.backup.prefix, config.backup.jobid, index);
     var count = 0;
     var size = 0;
 
diff --git a/bin/incremental-diff-record.js b/bin/incremental-diff-record.js
index afc1bee..ece6282 100755
--- a/bin/incremental-diff-record.js
+++ b/bin/incremental-diff-record.js
@@ -7,6 +7,7 @@ var crypto = require('crypto');
 var AWS = require('aws-sdk');
 var s3 = new AWS.S3();
 var assert = require('assert');
+var joinPath = require('path.join');
 
 var args = minimist(process.argv.slice(2));
 
@@ -69,13 +70,13 @@ try {
 catch (err) { key = JSON.parse(key); }
 
 
-s3url.Key = [
+s3url.Key = joinPath(
     s3url.Key,
     table,
     crypto.createHash('md5')
         .update(Dyno.serialize(key))
         .digest('hex')
-].join('/');
+);
 
 var dyno = Dyno({
     region: region,
diff --git a/bin/incremental-record-history.js b/bin/incremental-record-history.js
index c4e6b6d..e3c28e2 100755
--- a/bin/incremental-record-history.js
+++ b/bin/incremental-record-history.js
@@ -7,6 +7,7 @@ var AWS = require('aws-sdk');
 var s3 = new AWS.S3();
 var queue = require('queue-async');
 var Dyno = require('dyno');
+var joinPath = require('path.join');
 
 var args = minimist(process.argv.slice(2));
 
@@ -67,13 +68,13 @@ try {
 }
 catch (err) { key = JSON.parse(key); }
 
-s3url.Key = [
+s3url.Key = joinPath(
     s3url.Key,
     table,
     crypto.createHash('md5')
         .update(Dyno.serialize(key))
         .digest('hex')
-].join('/');
+);
 
 var q = queue(100);
 q.awaitAll(function(err, results) {
diff --git a/index.js b/index.js
index 4c3b298..6cf1bf8 100644
--- a/index.js
+++ b/index.js
@@ -4,6 +4,7 @@ var queue = require('queue-async');
 var crypto = require('crypto');
 var https = require('https');
 var streambot = require('streambot');
+var joinPath = require('path.join');
 
 module.exports.replicate = replicate;
 module.exports.streambotReplicate = streambot(function(event, callback) {
@@ -189,7 +190,7 @@ function incrementalBackup(event, context, callback) {
 
                 var params = {
                     Bucket: process.env.BackupBucket,
-                    Key: [process.env.BackupPrefix, table, id].join('/')
+                    Key: joinPath(process.env.BackupPrefix, table, id)
                 };
 
                 var req = change.eventName === 'REMOVE' ? 'deleteObject' : 'putObject';
diff --git a/package.json b/package.json
index 9afafe7..d799099 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,7 @@
     "fastlog": "^1.0.0",
     "minimist": "^1.1.0",
     "queue-async": "1.0.7",
+    "path.join": "1.0.0",
     "s3scan": "^0.2.2",
     "s3urls": "^1.3.0",
     "split": "^0.3.3",
diff --git a/s3-backfill.js b/s3-backfill.js
index b70e0af..b63b227 100644
--- a/s3-backfill.js
+++ b/s3-backfill.js
@@ -4,6 +4,7 @@ var stream = require('stream');
 var queue = require('queue-async');
 var crypto = require('crypto');
 var https = require('https');
+var joinPath = require('path.join');
 
 module.exports = backfill;
 
@@ -59,7 +60,7 @@ function backfill(config, done) {
 
             var params = {
                 Bucket: config.backup.bucket,
-                Key: [config.backup.prefix, config.table, id].join('/'),
+                Key: joinPath(config.backup.prefix, config.table, id),
                 Body: Dyno.serialize(record)
             };
 
diff --git a/s3-snapshot.js b/s3-snapshot.js
index fe3b3d0..cd4b6ad 100644
--- a/s3-snapshot.js
+++ b/s3-snapshot.js
@@ -3,6 +3,7 @@ var s3scan = require('s3scan');
 var zlib = require('zlib');
 var stream = require('stream');
 var AgentKeepAlive = require('agentkeepalive');
+var joinPath = require('path.join');
 
 module.exports = function(config, done) {
     var log = config.log || console.log;
@@ -29,7 +30,7 @@ module.exports = function(config, done) {
     var s3 = new AWS.S3(s3Options);
 
     var size = 0;
-    var uri = ['s3:/', config.source.bucket, config.source.prefix].join('/');
+    var uri = 's3://' + joinPath(config.source.bucket, config.source.prefix);
     var partsLoaded = -1;
 
     var objStream = s3scan.Scan(uri, { s3: s3 })