diff --git a/Octokit.Tests/Clients/TeamsClientTests.cs b/Octokit.Tests/Clients/TeamsClientTests.cs
index c08c640a..31806b0c 100644
--- a/Octokit.Tests/Clients/TeamsClientTests.cs
+++ b/Octokit.Tests/Clients/TeamsClientTests.cs
@@ -309,7 +309,7 @@ namespace Octokit.Tests.Clients
 
                 client.AddRepository(1, "org", "repo", newPermission);
 
-                connection.Connection.Received().Put(Arg.Is<Uri>(u => u.ToString() == "teams/1/repos/org/repo"), Arg.Any<object>());
+                connection.Connection.Received().Put(Arg.Is<Uri>(u => u.ToString() == "teams/1/repos/org/repo"), Arg.Any<object>(), "application/vnd.github.ironman-preview+json");
             }
 
             [Fact]
diff --git a/Octokit/Clients/TeamsClient.cs b/Octokit/Clients/TeamsClient.cs
index 25d986e9..e23f3ba2 100644
--- a/Octokit/Clients/TeamsClient.cs
+++ b/Octokit/Clients/TeamsClient.cs
@@ -335,8 +335,8 @@ namespace Octokit
 
             try
             {
-                var httpStatusCode = await ApiConnection.Connection.Put(endpoint, permission).ConfigureAwait(false);
-                return httpStatusCode == HttpStatusCode.NoContent;
+                var httpStatusCode = await ApiConnection.Connection.Put<HttpStatusCode>(endpoint, permission, "", AcceptHeaders.OrganizationPermissionsPreview).ConfigureAwait(false);
+                return httpStatusCode.HttpResponse.StatusCode == HttpStatusCode.NoContent;
             }
             catch (NotFoundException)
             {
diff --git a/Octokit/Http/Connection.cs b/Octokit/Http/Connection.cs
index 229849f7..7a8a203f 100644
--- a/Octokit/Http/Connection.cs
+++ b/Octokit/Http/Connection.cs
@@ -404,21 +404,6 @@ namespace Octokit
             return response.HttpResponse.StatusCode;
         }
 
-        /// <summary>
-        /// Performs an asynchronous HTTP PUT request that expects an empty response.
-        /// </summary>
-        /// <param name="uri">URI endpoint to send request to</param>
-        /// <param name="body">The object to serialize as the body of the request</param>
-        /// <returns>The returned <seealso cref="HttpStatusCode"/></returns>
-        public async Task<HttpStatusCode> Put(Uri uri, object body)
-        {
-            Ensure.ArgumentNotNull(uri, "uri");
-            Ensure.ArgumentNotNull(body, "body");
-
-            var response = await SendData<object>(uri, HttpMethod.Put, body, null, null, CancellationToken.None).ConfigureAwait(false);
-            return response.HttpResponse.StatusCode;
-        }
-
         /// <summary>
         /// Performs an asynchronous HTTP DELETE request that expects an empty response.
         /// </summary>
diff --git a/Octokit/Http/IConnection.cs b/Octokit/Http/IConnection.cs
index d89c22c3..39ddac53 100644
--- a/Octokit/Http/IConnection.cs
+++ b/Octokit/Http/IConnection.cs
@@ -197,14 +197,6 @@ namespace Octokit
         /// <returns>The returned <seealso cref="HttpStatusCode"/></returns>
         Task<HttpStatusCode> Put(Uri uri);
 
-        /// <summary>
-        /// Performs an asynchronous HTTP PUT request that expects an empty response.
-        /// </summary>
-        /// <param name="uri">URI endpoint to send request to</param>
-        /// <param name="body">The object to serialize as the body of the request</param>
-        /// <returns>The returned <seealso cref="HttpStatusCode"/></returns>
-        Task<HttpStatusCode> Put(Uri uri, object body);
-
         /// <summary>
         /// Performs an asynchronous HTTP DELETE request that expects an empty response.
         /// </summary>