diff --git a/gnes/preprocessor/__init__.py b/gnes/preprocessor/__init__.py
index e5b976d2..269a3541 100644
--- a/gnes/preprocessor/__init__.py
+++ b/gnes/preprocessor/__init__.py
@@ -23,8 +23,8 @@
     'TextPreprocessor': 'text.simple',
     'BaseImagePreprocessor': 'image.base',
     'BaseTextPreprocessor': 'text.base',
-    'VanillaSlidingPreprocessor': 'image.simple',
-    'WeightedSlidingPreprocessor': 'image.simple',
+    'VanillaSlidingPreprocessor': 'image.sliding_window',
+    'WeightedSlidingPreprocessor': 'image.sliding_window',
     'SegmentPreprocessor': 'image.segmentation',
     'BaseSingletonPreprocessor': 'base',
     'BaseVideoPreprocessor': 'video.base',
diff --git a/gnes/preprocessor/image/slidingWindow.py b/gnes/preprocessor/image/sliding_window.py
similarity index 100%
rename from gnes/preprocessor/image/slidingWindow.py
rename to gnes/preprocessor/image/sliding_window.py