diff --git a/2d_spots_in_fibers.py b/2d_spots_in_fibers.py
index 4f516423ef56a238671c20972c714ae17d4cf010..0c42fbf00e130a80e3ba3cad3674327af5b03114 100644
--- a/2d_spots_in_fibers.py
+++ b/2d_spots_in_fibers.py
@@ -7,7 +7,7 @@
 #@ Integer (label="DAPI threshold", description="0 = Auto", min=0) threshold
 #@ String (label="processing channels", description="comma separated list of channels, e.g. 2,3,6,7", value="1,2,3,4") processing_channels_string
 #@ String (label="Spot detection quality threshold", description="comma separated list of values, one per channel", value="80,80,80,80" ) quality_thresholds_string
-#@ Double (label="Minimum spot diameter", description="smaller spots will be discarded", value=5, min=1, max=200, stepSize=0.5, persist=false) spot_diameter
+#@ Double (label="Minimum spot diameter", description="smaller spots will be discarded", value=0.3, min=1, max=10, stepSize=0.1) spot_diameter
 
 # trackmate imports
 from fiji.plugin.trackmate import Settings