diff --git a/src/gui_qt/data/valueeditwidget.py b/src/gui_qt/data/valueeditwidget.py
index ae95a5f..de2376b 100644
--- a/src/gui_qt/data/valueeditwidget.py
+++ b/src/gui_qt/data/valueeditwidget.py
@@ -385,6 +385,6 @@ class ValueModel(QtCore.QAbstractTableModel):
     @staticmethod
     def as_string(value) -> str:
         if isinstance(value, complex):
-            return f'{value.real:.8g}{value.imag:+.8g}j'
+            return f'{value.real:.13g}{value.imag:+.13g}j'
         else:
-            return f'{value:.8g}'
+            return f'{value:.13g}'