diff --git a/wing_design/wing_design_conf.xml b/wing_design/wing_design_conf.xml
index bb76e02397984c248ea3cb97e6c7d354b7897199..0b48a4885fb32394ac68fe6679a21bebf8bf86b1 100644
--- a/wing_design/wing_design_conf.xml
+++ b/wing_design/wing_design_conf.xml
@@ -147,7 +147,7 @@
 						<parameters description="Mode parameters">
 							<mode_0 description="user_defined">
 								<aspect_ratio description="user aspect ratio">
-									<value>10.3</value>
+									<value>9.5</value>
 									<unit>1</unit>
 									<lower_boundary>6</lower_boundary>
 									<upper_boundary>20</upper_boundary>