diff --git a/scripts/preprocessor/model_free_preprocessors.py b/scripts/preprocessor/model_free_preprocessors.py
index 6b333e359..54e6c1f6d 100644
--- a/scripts/preprocessor/model_free_preprocessors.py
+++ b/scripts/preprocessor/model_free_preprocessors.py
@@ -93,7 +93,7 @@ class PreprocessorBlurGaussian(Preprocessor):
     def __init__(self):
         super().__init__(name="blur_gaussian")
         self.slider_1 = PreprocessorParameter(
-            label="Sigma", minimum=64, maximum=2048, value=512
+            label="Sigma", minimum=0.01, maximum=64.0, value=9.0
         )
         self.tags = ["Tile"]