diff --git a/internal/models/deployment.go b/internal/models/deployment.go
index e0af1ec..a650e33 100644
--- a/internal/models/deployment.go
+++ b/internal/models/deployment.go
@@ -134,23 +134,23 @@ func (d *Deployment) ShortCommit() string {
 }
 
 // FinishedAtISO returns the finished time in ISO format for JavaScript parsing.
-// Falls back to started time if not finished yet.
+// Returns empty string if not finished yet.
 func (d *Deployment) FinishedAtISO() string {
 	if d.FinishedAt.Valid {
 		return d.FinishedAt.Time.Format(time.RFC3339)
 	}
 
-	return d.StartedAt.Format(time.RFC3339)
+	return ""
 }
 
 // FinishedAtFormatted returns the finished time formatted for display.
-// Falls back to started time if not finished yet.
+// Returns empty string if not finished yet.
 func (d *Deployment) FinishedAtFormatted() string {
 	if d.FinishedAt.Valid {
 		return d.FinishedAt.Time.Format("2006-01-02 15:04:05")
 	}
 
-	return d.StartedAt.Format("2006-01-02 15:04:05")
+	return ""
 }
 
 func (d *Deployment) insert(ctx context.Context) error {
diff --git a/templates/app_detail.html b/templates/app_detail.html
index 2b397ec..caefa22 100644
--- a/templates/app_detail.html
+++ b/templates/app_detail.html
@@ -305,7 +305,7 @@
                         <template x-for="d in deployments" :key="d.id">
                             <tr>
                                 <td class="text-gray-500">
-                                    <span x-text="formatTime(d.finishedAtISO)" :title="d.finishedAtLabel"></span>
+                                    <span x-text="formatTime(d.finishedAtISO) || '-'" :title="d.finishedAtLabel"></span>
                                 </td>
                                 <td class="text-gray-500" x-text="d.duration || '-'"></td>
                                 <td>