diff --git a/internal/event/callback/issue.go b/internal/event/callback/issue.go
index 2dc68d0..1c04984 100644
--- a/internal/event/callback/issue.go
+++ b/internal/event/callback/issue.go
@@ -89,9 +89,9 @@ func (cb *IssueCommentCreated) buildMessage(ctx context.Context, installCtx gith
 
 	var title string
 	if event.Issue.IsPullRequest() {
-		title = fmt.Sprintf(pullRequestReviewCommentedTitleFormat, mentionTexts.String(), model.InlineLink(event.Issue.GetHTMLURL(), "pull request"), sender)
+		title = fmt.Sprintf(pullRequestReviewCommentedTitleFormat, mentionTexts.String(), model.InlineLink(event.Comment.GetHTMLURL(), "pull request"), sender)
 	} else {
-		title = fmt.Sprintf(issueCommentCreatedTitleFormat, mentionTexts.String(), model.InlineLink(event.Issue.GetHTMLURL(), "issue"), sender)
+		title = fmt.Sprintf(issueCommentCreatedTitleFormat, mentionTexts.String(), model.InlineLink(event.Comment.GetHTMLURL(), "issue"), sender)
 	}
 
 	blocks := []model.MessageBlock{model.NewTextBlock(title)}
diff --git a/internal/event/callback/pull_request.go b/internal/event/callback/pull_request.go
index 3f12f55..656c207 100644
--- a/internal/event/callback/pull_request.go
+++ b/internal/event/callback/pull_request.go
@@ -229,9 +229,9 @@ func (cb *PullRequestReviewEventSubmitted) buildMessage(ctx context.Context, ins
 	}
 	var title string
 	if event.Review.GetState() == "approved" {
-		title = fmt.Sprintf(pullRequestReviewApprovedTitleFormat, mentionTexts.String(), model.InlineLink(event.PullRequest.GetHTMLURL(), "pull request"), senderManager)
+		title = fmt.Sprintf(pullRequestReviewApprovedTitleFormat, mentionTexts.String(), model.InlineLink(event.Review.GetHTMLURL(), "pull request"), senderManager)
 	} else {
-		title = fmt.Sprintf(pullRequestReviewCommentedTitleFormat, mentionTexts.String(), model.InlineLink(event.PullRequest.GetHTMLURL(), "pull request"), senderManager)
+		title = fmt.Sprintf(pullRequestReviewCommentedTitleFormat, mentionTexts.String(), model.InlineLink(event.Review.GetHTMLURL(), "pull request"), senderManager)
 	}
 
 	return model.NewMessage(