diff --git a/dist/index.js b/dist/index.js
index 34a7828..b81842a 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -87,7 +87,7 @@ exports.default = function (_ref) {
       onBoundary: onBoundary
     };
 
-    _async2.default.forEach(options.objects, _async2.default.ensureAsync(processObject.bind(null, context)), onFinish);
+    _async2.default.forEachSeries(options.objects, _async2.default.ensureAsync(processObject.bind(null, context)), onFinish);
   });
 };
 
@@ -96,7 +96,7 @@ function processObject(context, object, cb) {
   fetchObjectFiles(context, object, function (err, filePaths) {
     if (err) return cb(err);
     debug(_chalk2.default.bold('Processing ' + filePaths.length + ' boundary ' + (0, _plural2.default)('file', filePaths.length) + ' for ' + object));
-    _async2.default.forEach(filePaths, _async2.default.ensureAsync(processFilePath.bind(null, context)), cb);
+    _async2.default.forEachSeries(filePaths, _async2.default.ensureAsync(processFilePath.bind(null, context)), cb);
   });
 }
 
diff --git a/package.json b/package.json
index 7bc5180..f7c0c23 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "census-boundaries",
-  "version": "2.0.3",
+  "version": "2.0.4",
   "description": "Downloads and converts US Census TIGER data representing all boundaries in the United States",
   "main": "dist/index.js",
   "keywords": [
diff --git a/src/index.js b/src/index.js
index 8450a75..c35c52a 100644
--- a/src/index.js
+++ b/src/index.js
@@ -33,7 +33,7 @@ export default ({ objects, onBoundary, onFinish }) => {
       onBoundary
     }
 
-    async.forEach(options.objects, async.ensureAsync(processObject.bind(null, context)), onFinish)
+    async.forEachSeries(options.objects, async.ensureAsync(processObject.bind(null, context)), onFinish)
   })
 }
 
@@ -42,7 +42,7 @@ function processObject(context, object, cb) {
   fetchObjectFiles(context, object, (err, filePaths) => {
     if (err) return cb(err)
     debug(chalk.bold(`Processing ${filePaths.length} boundary ${plural('file', filePaths.length)} for ${object}`))
-    async.forEach(filePaths, async.ensureAsync(processFilePath.bind(null, context)), cb)
+    async.forEachSeries(filePaths, async.ensureAsync(processFilePath.bind(null, context)), cb)
   })
 }