diff --git a/Rest.Net/HttpListenerResponseExtensions.cs b/Rest.Net/HttpListenerResponseExtensions.cs
index 8d74f48..058731b 100644
--- a/Rest.Net/HttpListenerResponseExtensions.cs
+++ b/Rest.Net/HttpListenerResponseExtensions.cs
@@ -379,14 +379,17 @@ namespace MontoyaTech.Rest.Net
         /// </summary>
         /// <param name="response"></param>
         /// <param name="stream"></param>
+        /// <param name="mimeType">If set, sets the content type to this value. If null, and no content type is set, sets it to octet-stream.</param>
         /// <returns>This response.</returns>
         /// <exception cref="ArgumentNullException"></exception>
-        public static HttpListenerResponse WithStream(this HttpListenerResponse response, Stream stream)
+        public static HttpListenerResponse WithStream(this HttpListenerResponse response, Stream stream, string mimeType = null)
         {
             if (stream == null)
                 throw new ArgumentNullException($"{nameof(stream)} cannot be null.");
 
-            if (string.IsNullOrWhiteSpace(response.ContentType))
+            if (!string.IsNullOrWhiteSpace(mimeType))
+                response.ContentType = mimeType;
+            else if (string.IsNullOrWhiteSpace(response.ContentType))
                 response.ContentType = "application/octet-stream";
 
             try
diff --git a/Rest.Net/Rest.Net.csproj b/Rest.Net/Rest.Net.csproj
index 2d1b2c9..f6ffd34 100644
--- a/Rest.Net/Rest.Net.csproj
+++ b/Rest.Net/Rest.Net.csproj
@@ -17,7 +17,7 @@
     <AssemblyName>MontoyaTech.Rest.Net</AssemblyName>
     <RootNamespace>MontoyaTech.Rest.Net</RootNamespace>
     <GenerateDocumentationFile>True</GenerateDocumentationFile>
-    <Version>1.8.6</Version>
+    <Version>1.8.7</Version>
     <PackageReleaseNotes></PackageReleaseNotes>
     <PackageIcon>Logo_Symbol_Black_Outline.png</PackageIcon>
   </PropertyGroup>