diff --git a/docs/source/normalization.rst b/docs/source/normalization.rst
index 073d468..71ebea6 100644
--- a/docs/source/normalization.rst
+++ b/docs/source/normalization.rst
@@ -2,11 +2,6 @@ normalization
 ============================================
 
 
-demo_normalizer
---------------------------------------------
-
-.. automodule:: auxiliary.normalization.demo_normalizer
-
 
 functional
 --------------------------------------------
diff --git a/pyproject.toml b/pyproject.toml
index d28c788..b441bb4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,6 @@ numpy = ">=1.24"
 tifffile = ">=2023.8.25"
 path = ">=16.7.1"
 pillow = ">=10.0.0"
-matplotlib = ">=3.4.0"
 
 [tool.poetry.dev-dependencies]
 pytest = ">=6.2"