diff --git a/pyproject.toml b/pyproject.toml
index 6a2260be..19f2481c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ classifiers = [
 dynamic = ["version"]
 requires-python = ">=3.8"
 dependencies = [
-    "numpy>=1.16.0", <1.23,
+    "numpy>=1.16.0, <1.23",
     "pandas>=1.0",
     "rich>=12",
     "pyteomics>=4.1.0, <4.7",