diff --git a/lib/src/service.dart b/lib/src/service.dart
index 73a6bf7..06ac588 100644
--- a/lib/src/service.dart
+++ b/lib/src/service.dart
@@ -143,7 +143,7 @@ class Service {
     var request = await UpnpCommon.httpClient.postUrl(Uri.parse(controlUrl));
     request.headers.set("SOAPACTION", '"${type}#${name}"');
     request.headers.set("Content-Type", 'text/xml; charset="utf-8"');
-    request.headers.set("User-Agent", 'CyberGarage-HTTP/1.0');
+    request.headers.set("Content-Length", body.runes.length);
     request.write(body);
     var response = await request.close();
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 6cb9e36..2869ee9 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -3,8 +3,8 @@ version: 2.0.1
 description: Universal Plugin and Play Host/Client
 homepage: https://github.com/SpinlockLabs/upnp.dart
 dependencies:
-  xml: "^4.5.1"
-  crypto: "^2.1.5"
+  xml: "^5.3.1"
+  crypto: ^3.0.1
 environment:
   sdk: ">=2.0.0 <3.0.0"