diff --git a/.travis.yml b/.travis.yml
index a73a717ecf..9745633faa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,10 +5,10 @@ matrix:
     - os: linux
       dist: trusty
       sudo: required
-      dotnet: 1.0.1
+      dotnet: 1.0.4
     - os: osx
       osx_image: xcode8
-      dotnet: 1.0.1
+      dotnet: 1.0.4
 
 before_script:
   - if test "$TRAVIS_OS_NAME" == "osx"; then export FrameworkPathOverride=/Library/Frameworks/Mono.framework/Versions/Current/lib/mono/4.5/; else export FrameworkPathOverride=/usr/lib/mono/4.5/; fi
diff --git a/Octokit/Models/Response/Milestone.cs b/Octokit/Models/Response/Milestone.cs
index 727592b08a..2d82cf5328 100644
--- a/Octokit/Models/Response/Milestone.cs
+++ b/Octokit/Models/Response/Milestone.cs
@@ -14,7 +14,7 @@ public Milestone(int number)
             Number = number;
         }
 
-        public Milestone(string url, string htmlUrl, int number, ItemState state, string title, string description, User creator, int openIssues, int closedIssues, DateTimeOffset createdAt, DateTimeOffset? dueOn, DateTimeOffset? closedAt)
+        public Milestone(string url, string htmlUrl, int number, ItemState state, string title, string description, User creator, int openIssues, int closedIssues, DateTimeOffset createdAt, DateTimeOffset? dueOn, DateTimeOffset? closedAt, DateTimeOffset? updatedAt)
         {
             Url = url;
             HtmlUrl = htmlUrl;
@@ -28,6 +28,7 @@ public Milestone(string url, string htmlUrl, int number, ItemState state, string
             CreatedAt = createdAt;
             DueOn = dueOn;
             ClosedAt = closedAt;
+            UpdatedAt = updatedAt;
         }
 
         /// <summary>
@@ -51,7 +52,7 @@ public Milestone(string url, string htmlUrl, int number, ItemState state, string
         public StringEnum<ItemState> State { get; protected set; }
 
         /// <summary>
-        /// Title of the milestone
+        /// Title of the milestone.
         /// </summary>
         public string Title { get; protected set; }
 
@@ -76,7 +77,7 @@ public Milestone(string url, string htmlUrl, int number, ItemState state, string
         public int ClosedIssues { get; protected set; }
 
         /// <summary>
-        /// The date this milestone was created
+        /// The date this milestone was created.
         /// </summary>
         public DateTimeOffset CreatedAt { get; protected set; }
 
@@ -90,6 +91,11 @@ public Milestone(string url, string htmlUrl, int number, ItemState state, string
         /// </summary>
         public DateTimeOffset? ClosedAt { get; protected set; }
 
+        /// <summary>
+        /// The date, if any, when this milestone was updated.
+        /// </summary>
+        public DateTimeOffset? UpdatedAt { get; protected set; }
+
         internal string DebuggerDisplay
         {
             get { return string.Format(CultureInfo.InvariantCulture, "Title {0} ", Title); }