diff --git a/.gitignore b/.gitignore
index aaf4127e..4184f938 100644
--- a/.gitignore
+++ b/.gitignore
@@ -102,4 +102,7 @@ Backup/
 tools/*
 !tools/gitversion_wrapper.sh
 !tools/LINQPad
-coverage-results/*
\ No newline at end of file
+coverage-results/*
+
+# Rider
+**/.idea/*
\ No newline at end of file
diff --git a/Octokit/Models/Response/Milestone.cs b/Octokit/Models/Response/Milestone.cs
index 3d1b77b7..4f149a2d 100644
--- a/Octokit/Models/Response/Milestone.cs
+++ b/Octokit/Models/Response/Milestone.cs
@@ -14,10 +14,11 @@ namespace Octokit
             Number = number;
         }
 
-        public Milestone(string url, string htmlUrl, int number, string nodeId, ItemState state, string title, string description, User creator, int openIssues, int closedIssues, DateTimeOffset createdAt, DateTimeOffset? dueOn, DateTimeOffset? closedAt, DateTimeOffset? updatedAt)
+        public Milestone(string url, string htmlUrl, long id, int number, string nodeId, ItemState state, string title, string description, User creator, int openIssues, int closedIssues, DateTimeOffset createdAt, DateTimeOffset? dueOn, DateTimeOffset? closedAt, DateTimeOffset? updatedAt)
         {
             Url = url;
             HtmlUrl = htmlUrl;
+            Id = id;
             Number = number;
             NodeId = nodeId;
             State = state;
@@ -41,6 +42,11 @@ namespace Octokit
         /// The Html page for this milestone.
         /// </summary>
         public string HtmlUrl { get; protected set; }
+        
+        /// <summary>
+        /// The ID for this milestone.
+        /// </summary>
+        public long Id { get; protected set; }
 
         /// <summary>
         /// The milestone number.