diff --git a/pyproject.toml b/pyproject.toml
index 773b662c..4d90904f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,6 @@ dependencies = [
     "lxml>=4.6.4",
     "matplotlib>=3.4.3",
     "numpy>=1.21.4",
-    "numpydoc>=1.1.0",
     "openpyxl>=3.0.9",
     "requests>=2.26.0",
     "scipy>=1.7.2",
@@ -48,6 +47,7 @@ docs = [
     "sphinx-automodapi",
     "sphinx>=7.2.5",
     "numpy",
+    "numpydoc>=1.1.0",
     "matplotlib",
     "scipy",
     "tomli; python_version<\"3.11\"",