diff --git a/GUI/MainForm.cs b/GUI/MainForm.cs
index 9652141..ee19fed 100644
--- a/GUI/MainForm.cs
+++ b/GUI/MainForm.cs
@@ -167,7 +167,7 @@ private void FinalOutput_KeyDown(object sender, KeyEventArgs e) {
 
         private void UpdateOperationProgress() {
             this.statusLabel.Text = _resolver.StatusMessage;
-            this.progressBar.Value = _resolver.PercentComplete;
+            this.progressBar.Value = Math.Min(StackResolver.Operation100Percent, _resolver.PercentComplete);
             this.statusStrip.Refresh();
             Application.DoEvents();
         }