diff --git a/MLEM.Ui/Elements/ElementHelper.cs b/MLEM.Ui/Elements/ElementHelper.cs
index 20cbf42..d2d8e83 100644
--- a/MLEM.Ui/Elements/ElementHelper.cs
+++ b/MLEM.Ui/Elements/ElementHelper.cs
@@ -17,7 +17,8 @@ namespace MLEM.Ui.Elements {
                 OnClicked = (element, button) => {
                     if (button == MouseButton.Left) {
                         var text = field.Text.ToString();
-                        field.SetText(int.Parse(text) + stepPerClick);
+                        if (int.TryParse(text, out var val))
+                            field.SetText(val + stepPerClick);
                     }
                 }
             };
@@ -28,7 +29,8 @@ namespace MLEM.Ui.Elements {
                 OnClicked = (element, button) => {
                     if (button == MouseButton.Left) {
                         var text = field.Text.ToString();
-                        field.SetText(int.Parse(text) - stepPerClick);
+                        if (int.TryParse(text, out var val))
+                            field.SetText(val - stepPerClick);
                     }
                 }
             };