diff --git a/src/Octokit.GraphQL/Model/Issue.cs b/src/Octokit.GraphQL/Model/Issue.cs
index d37fb806..714b731b 100644
--- a/src/Octokit.GraphQL/Model/Issue.cs
+++ b/src/Octokit.GraphQL/Model/Issue.cs
@@ -34,6 +34,24 @@ internal Issue(Expression expression) : base(expression)
         /// </summary>
         public IActor Author => this.CreateProperty(x => x.Author, Octokit.GraphQL.Model.Internal.StubIActor.Create);
 
+        /// <summary>
+        /// The parent entity of the issue.
+        /// </summary>
+        public Issue Parent => this.CreateProperty(x => x.Parent, Octokit.GraphQL.Model.Issue.Create);
+
+        /// <summary>
+        /// A list of sub-issues associated with the Issue.
+        /// </summary>
+        /// <param name="first">Returns the first _n_ elements from the list.</param>
+        /// <param name="after">Returns the elements in the list that come after the specified cursor.</param>
+        /// <param name="last">Returns the last _n_ elements from the list.</param>
+        /// <param name="before">Returns the elements in the list that come before the specified cursor.</param>
+        public IssueConnection SubIssues(Arg<int>? first = null, Arg<string>? after = null, Arg<int>? last = null, Arg<string>? before = null) => this.CreateMethodCall(x => x.SubIssues(first, after, last, before), Octokit.GraphQL.Model.IssueConnection.Create);
+        
+        /// <summary>
+        /// Summary of the state of an issue's sub-issues
+        /// </summary>
+        public SubIssuesSummary SubIssuesSummary => this.CreateProperty(x => x.SubIssuesSummary, Octokit.GraphQL.Model.SubIssuesSummary.Create);
         /// <summary>
         /// Author's association with the subject of the comment.
         /// </summary>
diff --git a/src/Octokit.GraphQL/Model/SubIssuesSummary.cs b/src/Octokit.GraphQL/Model/SubIssuesSummary.cs
new file mode 100644
index 00000000..8de4983c
--- /dev/null
+++ b/src/Octokit.GraphQL/Model/SubIssuesSummary.cs
@@ -0,0 +1,35 @@
+using System.Linq.Expressions;
+using Octokit.GraphQL.Core;
+
+namespace Octokit.GraphQL.Model
+{
+    /// <summary>
+    /// Summary of the state of an issue's sub-issues
+    /// </summary>
+    public class SubIssuesSummary : QueryableValue<SubIssuesSummary>
+    {
+        internal SubIssuesSummary(Expression expression) : base(expression)
+        {
+        }
+
+        /// <summary>
+        /// Count of completed sub-issues
+        /// </summary>
+        public int Completed { get; }
+
+        /// <summary>
+        /// Percent of sub-issues which are completed
+        /// </summary>
+        public int percentCompleted { get; }
+
+        /// <summary>
+        /// Count of total number of sub-issues
+        /// </summary>
+        public int Total { get; }
+
+        internal static SubIssuesSummary Create(Expression expression)
+        {
+            return new SubIssuesSummary(expression);
+        }
+    }
+}
\ No newline at end of file