diff --git a/cad/configuration.scad b/cad/configuration.scad
index 411a2ab..b461b70 100644
--- a/cad/configuration.scad
+++ b/cad/configuration.scad
@@ -186,7 +186,7 @@ R03_sensor_diameter = 3.5;  // SDP33 sensor diameter
 R03_sensor_depth = 2.5;  // SDP33 sensor depth
 R03_slip_ring_offset = 0; // slip-ring offset from tube center
 R03_venturi_tube_height = 150;  // Venturi tube height (limited by max print size)
-R03_wall_thickness = 3; // Venturi tube wall thickness
+R03_wall_thickness = 5; // Venturi tube wall thickness
 R03_sealing_ring_thickness = 1.5; // sealing ring size
 R03_fin_width = 0.8; // width of vertical stabilizator
 R03_fin_length = 80; // length of vertical stabilizator