diff --git a/pyproject.toml b/pyproject.toml
index 52dcff1..b0d9d34 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,10 +8,10 @@ description = "Analyze backscattering noise"
 readme = "README.md"
 requires-python = ">=3.8"
 classifiers = [
-    "Programming Language :: Python :: 3",
+	"Programming Language :: Python :: 3",
 	"License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
 	"Intended Audience :: Science/Research",
-    "Operating System :: OS Independent",
+	"Operating System :: OS Independent",
 	"Development Status :: 2 - Pre-Alpha",
 	"Topic :: Scientific/Engineering",
 ]