diff --git a/metapeg_v2.py b/metapeg_v2.py
index 82c927f..8feb2b1 100644
--- a/metapeg_v2.py
+++ b/metapeg_v2.py
@@ -25,7 +25,7 @@ PML_UM = 1.0 #PML thickness
 BUFFER = 3.0
 DESIGN_WAVELENGTHS_UM = [1.50,1.55,1.60] #wavelengths at which to optimize the device
 DESIGN_REGION_UM = mp.Vector3(4,4,1)
-DESIGN_REGION_RESOLUTION = int(2 * RESOLUTION)
+DESIGN_REGION_RESOLUTION = int(RESOLUTION)
 DESIGN_REGION_CENTER = mp.Vector3(0, 0, DESIGN_REGION_UM.z / 2)
 NX_DESIGN_GRID = int(DESIGN_REGION_UM.x * DESIGN_REGION_RESOLUTION) + 1 
 NY_DESIGN_GRID = int(DESIGN_REGION_UM.y * DESIGN_REGION_RESOLUTION) + 1