diff --git a/PusherRESTDotNet.Tests/AcceptanceTests/PusherProviderTests.cs b/PusherRESTDotNet.Tests/AcceptanceTests/PusherProviderTests.cs
index add7d34..7af50e8 100644
--- a/PusherRESTDotNet.Tests/AcceptanceTests/PusherProviderTests.cs
+++ b/PusherRESTDotNet.Tests/AcceptanceTests/PusherProviderTests.cs
@@ -36,6 +36,16 @@ public void CanTriggerPush()
 			_defaultProvider.Trigger(request);
 		}
 
+        [Test]
+        [Explicit("Set your credentials in app.config for this test to pass")]
+        public void CanSendPercentageSignInEventMessage()
+        {
+            SetupDefaultProvider();
+            var request = new TestPusherRequest("test_channel", "my_event", @"{""some"":""data %""}");
+
+            _defaultProvider.Trigger(request);
+        }
+
 		[Test]
 		[Explicit("Set your credentials in app.config for this test to pass")]
 		public void CanTriggerPushWithAnonymousObject()
diff --git a/PusherRESTDotNet/PusherProvider.cs b/PusherRESTDotNet/PusherProvider.cs
index 0ed420c..044a052 100644
--- a/PusherRESTDotNet/PusherProvider.cs
+++ b/PusherRESTDotNet/PusherProvider.cs
@@ -52,6 +52,7 @@ public void Trigger(PusherRequest request)
                     client.Proxy = _webProxy;
                 }
 		        client.Encoding = Encoding.UTF8;
+                client.Headers.Add("Content-Type", "application/json");
 		        client.UploadString(requestUrl, request.JsonData);
 		    }
 		}