diff --git a/lib/Git/IssueManager.pm b/lib/Git/IssueManager.pm
index c61c393..2108205 100644
--- a/lib/Git/IssueManager.pm
+++ b/lib/Git/IssueManager.pm
@@ -764,4 +764,81 @@ sub get
   die("issue " . $id . " not found\n");
 }
 
+=method modify
+
+  modify an existing issues
+
+  @param 1. parameter = issue id
+  @param 2. parameter = modification hash
+            support keys subject, description, priority, severity, type
+
+=cut
+sub modify
+{
+  my $self  = shift;
+  my $id    = shift;
+  my $modifications = shift;
+
+  my @statusse = ("open","assigned","inprogress","closed");
+
+  die("IssueManager not initialized") unless $self->ready();
+  my $ref   = $self->repository->getReference('refs/heads/issues');
+  my $tag   = $ref->find(".tag")->content();
+  my $root  = $ref->getTree();
+
+  for my $s (@statusse)
+  {
+    for my $stat ($root->find($s))
+    {
+      for my $i ($stat->get())
+      {
+        if (ref($i) eq "Git::LowLevel::Tree")
+        {
+          my $subject = $i->find("subject");
+          my $mytag = $tag . "-" . substr($subject->hash(),0,8);
+          if ($id eq  $mytag)
+          {
+            $stat->del($i);
+            my $issue = $self->parseIssue($i, $tag, $s);
+
+            # modify the issue
+            if (defined($modifications->{subject}))
+            {
+              $issue->subject($modifications->{subject});
+            }
+
+            if (defined($modifications->{description}))
+            {
+              $issue->description($modifications->{description});
+            }
+
+            if (defined($modifications->{priority}))
+            {
+              $issue->priority($modifications->{priority});
+            }
+
+            if (defined($modifications->{severity}))
+            {
+              $issue->severity($modifications->{severity});
+            }
+
+            if (defined($modifications->{type}))
+            {
+              $issue->type($modifications->{type});
+            }
+
+            my $issueTree=$issue->createIssue($self->repository);
+            $stat->add($issueTree);
+            $ref->commit("modified issue " . $i->mypath);
+
+            return;
+           }
+        }
+      }
+    }
+  }
+  die("issue " . $id . " not found\n");
+}
+
+
 1;