diff --git a/news/183.feature b/news/183.feature
new file mode 100644
index 0000000..013640b
--- /dev/null
+++ b/news/183.feature
@@ -0,0 +1 @@
+Implement events for Comment (ICommentModifiedEvent) and Reply(IReplyModifiedEvent) modification [ericof]
\ No newline at end of file
diff --git a/plone/app/discussion/comment.py b/plone/app/discussion/comment.py
index 41d430f..cc1099f 100644
--- a/plone/app/discussion/comment.py
+++ b/plone/app/discussion/comment.py
@@ -13,8 +13,10 @@ from OFS.Traversable import Traversable
 from persistent import Persistent
 from plone.app.discussion import _
 from plone.app.discussion.events import CommentAddedEvent
+from plone.app.discussion.events import CommentModifiedEvent
 from plone.app.discussion.events import CommentRemovedEvent
 from plone.app.discussion.events import ReplyAddedEvent
+from plone.app.discussion.events import ReplyModifiedEvent
 from plone.app.discussion.events import ReplyRemovedEvent
 from plone.app.discussion.interfaces import IComment
 from plone.app.discussion.interfaces import IConversation
@@ -258,6 +260,16 @@ def notify_comment_added(obj, event):
     return notify(CommentAddedEvent(context, obj))
 
 
+def notify_comment_modified(obj, event):
+    """ Notify custom discussion events when a comment, or a reply, is modified
+    """
+    conversation = aq_parent(obj)
+    context = aq_parent(conversation)
+    if getattr(obj, 'in_reply_to', None):
+        return notify(ReplyModifiedEvent(context, obj))
+    return notify(CommentModifiedEvent(context, obj))
+
+
 def notify_comment_removed(obj, event):
     """ Notify custom discussion events when a comment or reply is removed
     """
diff --git a/plone/app/discussion/events.py b/plone/app/discussion/events.py
index 08925bb..e2ecc02 100644
--- a/plone/app/discussion/events.py
+++ b/plone/app/discussion/events.py
@@ -2,12 +2,14 @@
 """ Custom discussion events
 """
 from plone.app.discussion.interfaces import ICommentAddedEvent
+from plone.app.discussion.interfaces import ICommentModifiedEvent
 from plone.app.discussion.interfaces import ICommentRemovedEvent
 from plone.app.discussion.interfaces import IDiscussionEvent
 from plone.app.discussion.interfaces import ICommentDeletedEvent
 from plone.app.discussion.interfaces import ICommentPublishedEvent
 from plone.app.discussion.interfaces import ICommentTransitionEvent
 from plone.app.discussion.interfaces import IReplyAddedEvent
+from plone.app.discussion.interfaces import IReplyModifiedEvent
 from plone.app.discussion.interfaces import IReplyRemovedEvent
 from zope.interface import implementer
 
@@ -35,6 +37,12 @@ class CommentAddedEvent(DiscussionEvent):
     """
 
 
+@implementer(ICommentModifiedEvent)
+class CommentModifiedEvent(DiscussionEvent):
+    """ Event to be triggered when a Comment is modified
+    """
+
+
 @implementer(ICommentRemovedEvent)
 class CommentRemovedEvent(DiscussionEvent):
     """ Event to be triggered when a Comment is removed
@@ -47,6 +55,12 @@ class ReplyAddedEvent(DiscussionEvent):
     """
 
 
+@implementer(IReplyModifiedEvent)
+class ReplyModifiedEvent(DiscussionEvent):
+    """ Event to be triggered when a Comment reply is modified
+    """
+
+
 @implementer(IReplyRemovedEvent)
 class ReplyRemovedEvent(DiscussionEvent):
     """ Event to be triggered when a Comment reply is removed
diff --git a/plone/app/discussion/interfaces.py b/plone/app/discussion/interfaces.py
index c03c0bb..76a0cee 100644
--- a/plone/app/discussion/interfaces.py
+++ b/plone/app/discussion/interfaces.py
@@ -399,6 +399,11 @@ class ICommentAddedEvent(IDiscussionEvent):
     """
 
 
+class ICommentModifiedEvent(IDiscussionEvent):
+    """ Comment modified
+    """
+
+
 class ICommentRemovedEvent(IDiscussionEvent):
     """ Comment removed
     """
@@ -409,6 +414,11 @@ class IReplyAddedEvent(IDiscussionEvent):
     """
 
 
+class IReplyModifiedEvent(IDiscussionEvent):
+    """ Comment reply modified
+    """
+
+
 class IReplyRemovedEvent(IDiscussionEvent):
     """ Comment reply removed
     """
diff --git a/plone/app/discussion/subscribers.zcml b/plone/app/discussion/subscribers.zcml
index 20e1b7f..85e74e2 100644
--- a/plone/app/discussion/subscribers.zcml
+++ b/plone/app/discussion/subscribers.zcml
@@ -9,6 +9,12 @@
         handler=".comment.notify_workflow"
         />
 
+    <subscriber
+        for="plone.app.discussion.interfaces.IComment
+             zope.lifecycleevent.interfaces.IObjectModifiedEvent"
+        handler=".comment.notify_comment_modified"
+        />
+
     <subscriber
         for="plone.app.discussion.interfaces.IComment
              zope.lifecycleevent.interfaces.IObjectAddedEvent"
diff --git a/plone/app/discussion/tests/test_events.py b/plone/app/discussion/tests/test_events.py
index 860e6de..3742c76 100644
--- a/plone/app/discussion/tests/test_events.py
+++ b/plone/app/discussion/tests/test_events.py
@@ -6,6 +6,8 @@ from plone.app.testing import setRoles
 from plone.app.testing import TEST_USER_ID
 from Zope2.App import zcml
 from zope.component import createObject
+from zope.event import notify
+from zope.lifecycleevent import ObjectModifiedEvent
 
 import Products.Five
 import unittest
@@ -20,8 +22,10 @@ class EventsRegistry(object):
     """ Fake registry to be used while testing discussion events
     """
     commentAdded = False
+    commentModified = False
     commentRemoved = False
     replyAdded = False
+    replyModified = False
     replyRemoved = False
 
 #
@@ -33,6 +37,10 @@ def comment_added(doc, evt):
     EventsRegistry.commentAdded = True
 
 
+def comment_modified(doc, evt):
+    EventsRegistry.commentModified = True
+
+
 def comment_removed(doc, evt):
     EventsRegistry.commentRemoved = True
 
@@ -41,6 +49,10 @@ def reply_added(doc, evt):
     EventsRegistry.replyAdded = True
 
 
+def reply_modified(doc, evt):
+    EventsRegistry.replyModified = True
+
+
 def reply_removed(doc, evt):
     EventsRegistry.replyRemoved = True
 
@@ -78,6 +90,12 @@ class CommentEventsTest(unittest.TestCase):
             handler="plone.app.discussion.tests.test_events.comment_added"
             />
 
+          <subscriber
+            for="plone.app.discussion.interfaces.IComment
+                 zope.lifecycleevent.interfaces.IObjectModifiedEvent"
+            handler="plone.app.discussion.tests.test_events.comment_modified"
+            />
+
           <subscriber
             for="OFS.interfaces.ISimpleItem
                  plone.app.discussion.interfaces.ICommentRemovedEvent"
@@ -96,6 +114,18 @@ class CommentEventsTest(unittest.TestCase):
         conversation.addComment(comment)
         self.assertTrue(self.registry.commentAdded)
 
+    def test_modifyEvent(self):
+        self.assertFalse(self.registry.commentModified)
+        comment = createObject('plone.Comment')
+        conversation = IConversation(self.document)
+        new_id = conversation.addComment(comment)
+        comment = self.document.restrictedTraverse(
+            '++conversation++default/{0}'.format(new_id),
+        )
+        comment.text = "foo"
+        notify(ObjectModifiedEvent(comment))
+        self.assertTrue(self.registry.commentModified)
+
     def test_removedEvent(self):
         self.assertFalse(self.registry.commentRemoved)
         comment = createObject('plone.Comment')
@@ -131,6 +161,12 @@ class RepliesEventsTest(unittest.TestCase):
             handler="plone.app.discussion.tests.test_events.reply_added"
             />
 
+          <subscriber
+            for="plone.app.discussion.interfaces.IComment
+                 zope.lifecycleevent.interfaces.IObjectModifiedEvent"
+            handler="plone.app.discussion.tests.test_events.reply_modified"
+            />
+
           <subscriber
             for="OFS.interfaces.ISimpleItem
                  plone.app.discussion.interfaces.IReplyRemovedEvent"
@@ -163,6 +199,26 @@ class RepliesEventsTest(unittest.TestCase):
 
         self.assertTrue(self.registry.replyAdded)
 
+    def test_modifyEvent(self):
+        self.assertFalse(self.registry.replyModified)
+
+        conversation = IConversation(self.document)
+        replies = IReplies(conversation)
+        comment = createObject('plone.Comment')
+        comment.text = 'Comment text'
+        comment_id = replies.addComment(comment)
+        comment = self.document.restrictedTraverse(
+            '++conversation++default/{0}'.format(comment_id),
+        )
+        re_comment = createObject('plone.Comment')
+        re_comment.text = 'Comment text'
+        replies = IReplies(comment)
+        new_id = replies.addComment(re_comment)
+        reply = replies[new_id]
+        reply.text = "Another text"
+        notify(ObjectModifiedEvent(reply))
+        self.assertTrue(self.registry.replyModified)
+
     def test_removedEvent(self):
         self.assertFalse(self.registry.replyRemoved)