diff --git a/pyproject.toml b/pyproject.toml
index 929bca0..f96fe96 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "numericalderivative"
-version = "0.1"
+version = "0.2"
 description = "Numerical differentiation"
 readme = "README.md"
 keywords = [
@@ -30,7 +30,8 @@ classifiers = [
     "Topic :: Scientific/Engineering",
 ]
 dependencies = [
-    "numpy"
+    "numpy",
+    "scipy",
 ]
 
 [project.optional-dependencies]
diff --git a/setup.py b/setup.py
index 92fe06b..896b3bd 100644
--- a/setup.py
+++ b/setup.py
@@ -26,9 +26,9 @@
         "Optimal Step Size",
         "Numerical Analysis",
     ],
-    version="0.1",
+    version="0.2",
     packages=find_packages(),
-    install_requires=["numpy"],
+    install_requires=["numpy", "scipy"],
     description="Numerical differentiation",
     long_description=long_description,
     long_description_content_type="text/markdown",