diff --git a/index.js b/index.js
index 5036935..320dd72 100644
--- a/index.js
+++ b/index.js
@@ -57,14 +57,14 @@ module.exports = function(options, onprogress) {
 		update.remaining = length - update.transferred;
 		tr.emit('length', length);
 	};
-	
+
 	// Expose `onlength()` handler as `setLength()` to support custom use cases where length
 	// is not known until after a few chunks have already been pumped, or is
 	// calculated on the fly.
 	tr.setLength = onlength;
-	
+
 	tr.on('pipe', function(stream) {
-		if (typeof length === 'number') return;
+		if (options.length && typeof length === 'number') return;
 		// Support http module
 		if (stream.readable && !stream.writable && stream.headers) {
 			return onlength(parseInt(stream.headers['content-length'] || 0));
diff --git a/package.json b/package.json
index 6f85889..fb3be9c 100644
--- a/package.json
+++ b/package.json
@@ -20,13 +20,13 @@
   ],
   "main": "index.js",
   "dependencies": {
-    "through2": "~0.2.3",
-    "speedometer": "~0.1.2"
+    "speedometer": "^1.0.0",
+    "through2": "^2.0.1"
   },
   "devDependencies": {
-    "request": "~2.29.0",
-    "single-line-log": "~1.0.0",
-    "numeral": "~1.5.2"
+    "numeral": "~1.5.2",
+    "request": "^2.72.0",
+    "single-line-log": "^1.1.1"
   },
   "scripts": {
     "test": "node test/http.js && node test/request.js"