diff --git a/setup.py b/setup.py
index 076dacf..ff5ac3d 100644
--- a/setup.py
+++ b/setup.py
@@ -1,15 +1,19 @@
 import setuptools
 
-requirements = """
-ultralytics
-numpy
-opencv-python
-pandas
-pytest
-pyzbar
-pytest-cov
-""".split()
+install_requires = [
+    "ultralytics>=8.0,<9.0",
+    "numpy>=1.24",
+    "opencv-python>=4.8",
+    "pandas>=2.0",
+    "pyzbar>=0.1.9",
+]
 
+extras_require = {
+    "dev": [
+        "pytest>=7.0",
+        "pytest-cov>=4.0",
+    ]
+}
 
 setuptools.setup(
     name="granny",
@@ -20,9 +24,8 @@
     author="Nhan H. Nguyen, Heidi Hargarten, Loren Honaas, Stephen P. Ficklin",
     license="GNU General Public License v3.0",
     python_requires=">=3.9",
-    install_requires=[
-        requirements,
-    ],
+    install_requires=install_requires,
+    extras_require=extras_require,
     entry_points={
         "console_scripts": [
             "granny = Granny.GrannyBase:run",