diff --git a/Octokit.Tests/Clients/AssigneesClientTests.cs b/Octokit.Tests/Clients/AssigneesClientTests.cs
index 12615271..e067c688 100644
--- a/Octokit.Tests/Clients/AssigneesClientTests.cs
+++ b/Octokit.Tests/Clients/AssigneesClientTests.cs
@@ -21,7 +21,7 @@ namespace Octokit.Tests.Clients
 
                 client.GetAllForRepository("fake", "repo");
 
-                connection.Received().GetAll<User>(Arg.Is<Uri>(u => u.ToString() == "repos/fake/repo/assignees"));
+                connection.Received().GetAll<User>(Arg.Is<Uri>(u => u.ToString() == "repos/fake/repo/assignees"), null, AcceptHeaders.StableVersion, Args.ApiOptions);
             }
 
             [Fact]
diff --git a/Octokit/Clients/AssigneesClient.cs b/Octokit/Clients/AssigneesClient.cs
index f66b5dc1..16036c08 100644
--- a/Octokit/Clients/AssigneesClient.cs
+++ b/Octokit/Clients/AssigneesClient.cs
@@ -33,6 +33,24 @@ namespace Octokit
             return ApiConnection.GetAll<User>(ApiUrls.Assignees(owner, name));
         }
 
+        /// <summary>
+        /// Gets all the available assignees (owner + collaborators) to which issues may be assigned.
+        /// </summary>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="options">The options to change API's response.</param>
+        /// <returns></returns>
+        public Task<IReadOnlyList<User>> GetAllForRepository(string owner, string name, ApiOptions options)
+        {
+            Ensure.ArgumentNotNullOrEmptyString(owner, "owner");
+            Ensure.ArgumentNotNullOrEmptyString(name, "name");
+            Ensure.ArgumentNotNull(options, "options");
+
+            var endpoint = ApiUrls.Assignees(owner, name);
+
+            return ApiConnection.GetAll<User>(endpoint, null, options);
+        }
+
         /// <summary>
         /// Checks to see if a user is an assignee for a repository.
         /// </summary>
diff --git a/Octokit/Clients/IAssigneesClient.cs b/Octokit/Clients/IAssigneesClient.cs
index 2a1e0cdf..f3bc5b79 100644
--- a/Octokit/Clients/IAssigneesClient.cs
+++ b/Octokit/Clients/IAssigneesClient.cs
@@ -19,6 +19,15 @@ namespace Octokit
         /// <returns></returns>
         Task<IReadOnlyList<User>> GetAllForRepository(string owner, string name);
 
+        /// <summary>
+        /// Gets all the available assignees (owner + collaborators) to which issues may be assigned.
+        /// </summary>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="options">The options to chagne API's response.</param>
+        /// <returns></returns>
+        Task<IReadOnlyList<User>> GetAllForRepository(string owner, string name, ApiOptions options);
+
         /// <summary>
         /// Checks to see if a user is an assignee for a repository.
         /// </summary>