diff --git a/pypsbuilder/psbuilders.py b/pypsbuilder/psbuilders.py
index d3a035d..2d22cd9 100755
--- a/pypsbuilder/psbuilders.py
+++ b/pypsbuilder/psbuilders.py
@@ -1951,7 +1951,7 @@ def builder_ui_settings(self):
 
     def app_settings(self, write=False):
         # Applicatiom settings
-        builder_settings = QtCore.QSettings("LX", f"ptbuilder {QTPY_API}{QT_VERSION.split(".")[0]}")
+        builder_settings = QtCore.QSettings("LX", f"ptbuilder {QTPY_API}{QT_VERSION.split('.')[0]}")
         if write:
             builder_settings.setValue("steps", self.spinSteps.value())
             builder_settings.setValue("precision", self.spinPrec.value())